CN1322321C - Full digital type vickers hardness scale capable of converting dial of experimental result - Google Patents
Full digital type vickers hardness scale capable of converting dial of experimental result Download PDFInfo
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- CN1322321C CN1322321C CNB2004100126222A CN200410012622A CN1322321C CN 1322321 C CN1322321 C CN 1322321C CN B2004100126222 A CNB2004100126222 A CN B2004100126222A CN 200410012622 A CN200410012622 A CN 200410012622A CN 1322321 C CN1322321 C CN 1322321C
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Abstract
The present invention relates to a full digital Vickers hardometer capable of converting the scales of testing results, which belongs to the technical field of testing instruments of the performance of material mechanics. The Vickers hardometer comprises a machine frame, a testing force loading device arranged in the machine frame and is driven by a worm and a gear, a force sensor connected with the testing force loading device, a displacement sensor of which the measuring head can move with a press head capable of being replaced synchronously, and a signal and data processing system for the force sensor and the displacement sensor, wherein the signal and data processing system comprises the force sensor, a magnifier, a sampling-hold device(S/H), an analog/digital (A/D) converter, a displacement sensor, a magnifier, a sampling-hold device (S/H), an analog/digital (A/D)converter, a clock driver, a random-access memory RAM, a microcomputer, a display, a read only memory ROM and a keyboard; the sampling frequency of the displacement sensor is the same as the sampling frequency of the force sensor. The present invention has the advantage that obtained signals are processed by circuits and the microcomputer so as to judge the validity of testing in an online mode, and test results are obtained in an online mode; the test results can be converted into the hardness value of other scales. After the press head is replaced with another press head of which the working part accords with the corresponding hardness testing method, the present invention adapts to the testing of the Brinell, the Lorsch and the surface Lorsch hardness of small loads of test samples directly, and the test results can also be converted into the hardness value of other scales.
Description
Technical field
The present invention relates to the full digital Vickers of the convertible scale of a kind of test findings, belong to metal material mechanics performance testing apparatus technical field.
Background technology
Detect metal hardness instrument commonly used at present and comprise Brinell tester, Rockwell hardometer, superficial Rockwell hardness tester, Shore (Richter scale) sclerometer and Vickers etc., a kind of sclerometer is corresponding to a kind of hardness test method.
All sclero scopes are because the qualification of be put to the test method and test condition at present, what adopt is the disposable loading of rated load, therefore can't expect the compression distance of pressure head, can't control, can't judge the validity of test in real time the validity of process of the test and test; Except that the test of Rockwell, surface rockwell hardness, can't online acquisition test findings; Except that Vickers hardness test, all can not make thick, thin, soft, hard all kinds of test buttons set up continuous hardness scale.This is the fundamental issue that exists in the metal current hardness test.Though have digital display Bu Shi, Rockwell, surperficial Rockwell, Leeb Hardness Tester to come into operation at present, but its basic structure and principle are with original identical, also can not exceed the test condition that test method limits, the manually-operated and the calculating of contents such as impression measurement, sample mean hardness, hardness indicating value fluctuation degree have only been removed, not carrying out the process of the test major parameter shows and control, therefore do not have the real-time judge test validity yet, do not overcome or improve above-mentioned fundamental issue.
Vickers hardness test can make thick, thin, soft, hard all kinds of test buttons set up continuous Vickers hardness scale, but the Vickers of using at present exists some inconvenience and restriction when carrying out hardness test:
1. it is discontinuous to test power, have only limited several grades, can only put on pressure head once by the test power of institute's gear selecting during application, can not control the degree of pressure head pressing in sample with the method for control test power size, and test power also is to put on pressure head by counterweight through physical constructions such as levers, and error is bigger;
2. can not obtain test findings in real time, need shift out sample, after measuring the impression catercorner length, just can obtain, thereby efficient be low by calculating or tabling look-up;
Whether 3. sample or test layer thickness are that 1.5 times of impression catercorner length are only efficiency test at least, wait to have measured and could judge behind the impression catercorner length and test effectively, can't know, can not control the validity of test in the process of the test;
4. Vickers hardness number can not be converted to other hardness scale commonly used on demand, as changing, needs through manually tabling look-up.
Still not having a kind of sclerometer at present, both can carry out the direct measurement of various hardness scales commonly used, is again totally digitilized; Both can the Vickers hardness number that scale is continuous convert the hardness number of other scale commonly used to, can carry out the conversion between other hardness scale commonly used again.
Summary of the invention
The objective of the invention is: the full digital Vickers of the convertible scale of a kind of test findings is provided, and it is a sclerometer digital, the convertible scale of trial value, directly can test the Vickers hardness and the little load Vickers hardness number of test button; Can point out its main test condition according to selected Vickers hardness scale during on-test; The degree of depth that shows test power size and pressure head pressing in sample in the process of the test in real time; The validity of online this test of judgement during off-test, the online experimental data processing of carrying out is obtained test findings, and shows, stores; Can use the conversion of hardness number between the hardness scale on demand always.Have interchangeability when pressure head and cooperating of pressing head seat, said sclerometer just has versatility, also can directly measure the hardness number of other scale commonly used of sample, and can convert the hardness number of other hardness scale commonly used on demand to.The scleroscopic frame of the present invention can be nonvoluntary move desk-top, also can be the structure of miniaturization.Its frame of the sclerometer of miniaturization is box, is called portable hardometer, is preferred version, both can use in the fixation test chamber, also can be carried into on-the-spot the use.
Technical scheme of the present invention is: the full digital Vickers of the convertible scale of a kind of test findings, and it comprises a frame; Test force loading device that is installed in the frame by the worm and gear transmission; A force transducer that is connected with the test force loading device; A measuring head moves synchronous displacement transducer with the pressure head that can change; It also has a force transducer and displacement transducer signal, data handling system, comprise: force transducer, amplifier, sampling holding device (S/H) and analog/digital (A/D) converter, displacement transducer, amplifier, sampling holding device (S/H) and analog/digital (A/D) converter, clock driver, random access memory ram, microcomputer, display, read only memory ROM, keyboard; Wherein, the force transducer output signal is after amplifier amplifies, with passing to sampling holding device (S/H) and analog/digital (A/D) converter with the synchronous mode of the clock signal of clock driver, by 50～100 times/second frequency samplings, the conversion of analog/digital (A/D) converter, be converted to addition behind the digital quantity, the result is as test power; The displacement transducer output signal is after amplifier amplifies, and signals sampling, analog/digital (A/D) conversion are all carried out under the synchronization of clock signals control of clock driver; The displacement transducer sample frequency is identical with the sample frequency of force transducer; Keyboard (43) is provided with hardness test method key and numerical key, and signal processing system will enter when on-test hardness test method and test condition are determined by the hardness test method key and the numerical key of keyboard (43); Keyboard (43) is gone up also has " Enter " key, after loading procedure finishes, when test power is offloaded to setting,, carry out that hardness number is calculated, the validity of test is judged, test findings shows and storage by the execution sequence of " Enter " key control microcomputer (44) of keyboard (43); " conversion " key is arranged on the keyboard (43), determine that by " conversion " key system enters transition status; The hardness test method and the test condition that need convert to are determined by the hardness test method key and the numerical key of keyboard (43) successively; After microcomputer (44) is received the instruction of " conversion " hardness test method and test condition, be to change according to pre-depositing the Vickers hardness number in the read only memory ROM (55) and the conversion table of other hardness number, and according to new scale handle, show, storage.
Effect of the present invention is that the sensor signal that obtains, data are handled through circuit and microcomputer, the validity of online judgement test, online acquisition test findings; Test findings is convertible into the hardness number of other scale.Pressure head is replaced with after the measuring head working portion meets other kind of the pressure head of corresponding hardness test method, adapts to little load Bu Shi, Rockwell, the surface rockwell hardness of direct test sample equally, test findings is convertible into the hardness number of other scale equally.
Description of drawings
Fig. 1 is the embodiment of physical construction portable hardometer of the present invention, is illustrated as in the test, the front view of general structure when facet sample Vickers hardness or little load Vickers hardness;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is that A-A behind Fig. 1 removal loam cake 3 is to view;
Fig. 4 is the B-B cut-open view of Fig. 1;
Fig. 5 is the partial enlarged drawing of C among Fig. 1;
Fig. 6 is force transducer 8 and the displacement transducer 10 Signal Processing system handles process block diagram that obtains;
Structural drawing when Fig. 7 pressure head 17 and pressing head seat 20 cooperate with circular conical surface;
Fig. 8 is in the test, when small column is interviewed sample Vickers hardness or little load Vickers hardness, V-arrangement cushion block 47 structural drawing of the band pin 48 that is served as a contrast on the bearing plate 30;
When Fig. 9 is testing large ferromagnetism equal diameter face of cylinder sample Vickers hardness or little load Vickers hardness, magnet base 31 lower junction compositions (solid line illustrated embodiment) and template 49 bottom synoptic diagram (dotted line illustrated embodiment);
Figure 10 is a testing large ferromagnetism not when equal diameter face of cylinder sample Vickers hardness or little load Vickers hardness, magnet base 31 bottom flared structure figure (solid line illustrated embodiment) and template 51 bottom synoptic diagram (dotted line illustrated embodiment);
When Figure 11 is test ultra-large type ferromagnetism face of cylinder sample Vickers hardness or little load Vickers hardness, added template 53 structural drawing in magnet base 31 bottoms;
Figure 12 is that keyboard is formed synoptic diagram;
When Figure 13 was test medium and small face of cylinder sample little load Bu Shi, Rockwell, surface rockwell hardness, what served as a contrast on the bearing plate 30 was with protruding V-arrangement cushion block 46 structural drawing;
Pressure head 17 structural drawing when Figure 14 is little load Brinell test.
Embodiment
That the present invention is further illustrated is as follows below in conjunction with drawings and Examples:
As Fig. 1-shown in Figure 14, the full digital Vickers of the convertible scale of a kind of test findings, it has a frame; Test force loading device that is installed in the frame by 27 transmissions of worm gear 4 worm screws; A force transducer 8 that is connected with the test force loading device; A measuring head moves synchronous displacement transducer 10 with the pressure head 17 that can change; It also has a force transducer and displacement transducer signal, data handling system, this system is made up of following part: force transducer 8, amplifier 37, sampling holding device (S/H) and analog/digital (A/D) converter 40, displacement transducer 10, amplifier 38, sampling holding device (S/H) and analog/digital (A/D) converter 41, clock driver 39, random access memory ram 42, microcomputer 44, display 45, read only memory ROM 55, keyboard 43; Wherein, force transducer 8 output signals are after amplifier 37 amplifies, with passing to sampling holding device (S/H) and analog/digital (A/D) converter 40 with the synchronous mode of the clock signal of clock driver 39, by 50～100 times/second frequency samplings, the conversion of analog/digital (A/D) converter, be converted to addition behind the digital quantity, the result is as test power; Displacement transducer 10 output signals are after amplifier 38 amplifies, and signals sampling, analog/digital (A/D) conversion are all carried out under the synchronization of clock signals control of clock driver 39; Displacement transducer 10 sample frequency are identical with the sample frequency of force transducer 8; Also have, 3 force transducers 8 and 3 amplifiers 37 and 3 sampling holding devices (S/H) and analog/digital (A/D) converter 40 are arranged in the present embodiment sclerometer; 3 force transducers 8 are uniform and be fixed in force transducer seat 7; Keyboard 43 is provided with hardness test method key and numerical key, and signal processing system will enter when on-test hardness test method and test condition are determined by the hardness test method key and the numerical key of keyboard 43; Also has " Enter " key on the keyboard 43, after loading procedure finishes, when test power is offloaded to setting,, carry out that hardness number is calculated, the validity of test is judged, test findings shows and storage by the execution sequence of " Enter " key control microcomputer 44 of keyboard 43; " conversion " key is arranged on the keyboard 43, determine that by " conversion " key system enters transition status; The hardness test method and the test condition that need convert to are determined by the hardness test method key and the numerical key of keyboard 43 successively; After microcomputer 44 is received the instruction of " conversion " hardness test method and test condition, be to change according to pre-depositing the Vickers hardness number in the read only memory ROM 55 and the conversion table of other hardness number, and according to new scale handle, show, storage;
Described frame can be cantilevered desk-top frame, it is suitable for being fixed on testing laboratory's practicality, the frame of the embodiment of the invention is a cabinet rack, be convenient to take to on-the-spot test, it is made up of this cabinet rack with the spreading cover 13 of fixedlying connected with its lower end support 5, and a upper and lower back and a fixing force-closed framework of frame of sliding of energy is arranged on this frame; The described test force loading device that is installed in the frame, its worm screw 27 lower supports 25 are fixed in the support 5, worm-wheel shaft 6 lower ends are connected with force transducer seat 7 screwed hole of centre, constitute the power transmission screw thread pair, force transducer 8 is between force transducer seat 7 and pressing plate 12, and pressure head 17 overlaps pressure head lining 15 location of 13 lower end center pits by being fixed on spreading; Described displacement transducer 10 is below worm-wheel shaft 6, and its lower end measuring head often contacts with pressure head 17 or pressing head seat 20 upper surfaces, and displacement transducer 10 housings are by support plate 22 location, and this support plate 22 is to overlap 13 by support column 21 and spreading to fixedly connected; Force-closed framework comprises at least two columns 2 that are distributed in the whole frame of support 5 supported on both sides; The fixedly connected crossbeam 1 in these column 2 upper ends, the lower end is fixedly connected to have magnet base 31 magnetic switch 32, that can be connected with magnetic force with bearing plate 30 or ferromagnetism sample; Pressure head 17 has interchangeability, its upper end is connected with the right cylinder transition fit with the center pit of pressing head seat 20, or cone is connected, can be replaced with working portion and meet other kind of the pressure head that corresponding hardness test method requires, can adapt to little load Bu Shi, Rockwell, the surface rockwell hardness of directly testing various types of materials plane and face of cylinder sample.
It is as follows in conjunction with the accompanying drawings sclerometer of the present invention to be with portable cabinet rack that technical scheme, principle of work and the method for operating of embodiment made more specific description:
Fig. 1～Fig. 5 is during the present invention tests, the preferred embodiment structural drawing during all kinds of test button Vickers hardness of facet.
When testing the Vickers hardness of the medium and small plane of each metalloid sample 16, magnetic switch 32 leaves, and makes magnet base 31 be adsorbed in bearing plate 30, and instrument constitutes force-closed framework by crossbeam 1, column 2, magnet base 31, bearing plate 30; Loam cake 3 is connected with support 5 by connecting cover plate 34; Worm screw 27 usefulness upper supports 28, lower support 25 are fixed in support 5; Worm gear 4 cooperates with worm-wheel shaft 6, and is fixed in worm-wheel shaft 6 with holding screw; Worm-wheel shaft 6 is with axle supporting 26, axle sleeve 24 orientations.Spreading cover 13 is fixedly connected on support 5, its inboard uniform three guide rails 11; Three force transducers 8 are uniform and be fixed in force transducer seat 7, and pressing plate 12 usefulness screw rods 23 are connected with force transducer seat 7 and force transducer 8 is applied certain precompression; The threaded portion of worm-wheel shaft 6 cooperates with the screw at power sensing seat 7 centers, and force transducer seat 7, three uniform V-arrangement guide runners of pressing plate 12 peripheries cooperate with guide rail 11; The pressure head 17 upper end conical surfaces cooperate with the taper hole of pressing head seat 20, and the lower end working portion stretches out about the sheath end face 2mm that spreading overlaps 13 bottoms; Displacement transducer 10 usefulness holding screws 9 are fixed in the center pit of triangular support plate 22, and triangular support plate 22 places three gaps between the force transducer 8, and be fixed in spreading cover 13 by three pillars 21, make the housing and the support 5 of displacement transducer 10 fixing, relative displacement does not take place in both, and the measuring head of displacement transducer 10 is often contacted with pressure head 17 upper surfaces, and obtain preset value, make the axis and pressure head 17 axis coaxles of displacement transducer 10 simultaneously, when pressure head 17 upper ends more in short-term, measuring head often contacts with pressing head seat 20 center pit upper end-face edges.Support 5 grooves on two sides cooperate with column 2, make the support 5 can upper and lower slip between the column 2 of force-closed framework, and can be fixed in column 2 with locking handwheel 35, latch 36.
During Vickers hardness test, unclamp locking handwheel 35, mobile support 5 makes sheath 18 contact samples 16, move on the pressure head 17, make displacement transducer 10 obtain suitable, preset displacement (among Fig. 5) for the degree of depth of measuring pressure head 17 pressing in sample 16, with locking handwheel 35, latch 36 is fixed in column 2 with support 5 then, and this moment, the reading of displacement transducer 10 was a
0Evenly the externally applied forces square drives worm screw 27, worm gear 4, worm-wheel shaft 6 rotations by handwheel 33 continuously, makes pressing plate 12 press to pressing head seat 20, and the test power F that pressure head 17 obtains makes its working end pressing in sample 16.Along with the continuous increase of test power F, the reading a of displacement transducer 10
1Constantly change, the degree of depth of pressure head 17 pressing in sample 16 is h
1=a
1-a
0Dynamic h
1, F shows simultaneously in real time.When reaching setting, F stops to load.The reading of unloading back displacement transducer 10 is a
2, remaining depth of cup h=a
2-a
0H and F send microcomputer 44 to carry out data processing by test method, online carrying out after test validity judges, obtain the hardness number of sample 16 these points and show, storage.After each specimen test finishes, data such as microcomputer 44 output hardness mean values and hardness indicating value fluctuation degree.
Referring to Fig. 6.Three force transducer 8 output signals, respectively after three amplifiers 37 amplify, with passing to three sampling holding devices (S/H) with the synchronous mode of the clock signal of clock driver 39, by sampling holding device (S/H) and analog/digital (A/D) converter 40, by 50～100 times/second frequency samplings, A/D conversion, the F that is converted to digital signal is deposited in the random access memory ram 42, microcomputer 44 portion's clock signal control within it is shown in display 45 with the method for synchronization with the F of RAM 42 down.Simultaneously, similar ground, displacement transducer 10 output signals are after amplifier 38 amplifies, under the synchronization of clock signals control of clock driver 39, pass to sampling holding device (S/H) 41, A/D converter by sampling holding device 41, press the same frequency sampling, the A/D conversion, the signal that is converted to digital signal is deposited in the random access memory ram 42, microcomputer 44 portion's clock signal control within it down, with the method for synchronization with in the random access memory ram 42, the relative shift of displacement transducer 10 measuring heads (being the degree of depth of pressure head 17 pressing in sample 16) is shown in display 45 simultaneously.After loading procedure finishes, when test power F is offloaded to setting,, carry out that hardness number is calculated, the validity of test is judged, test findings shows with storage etc. by " Enter " key control microcomputer 44 of keyboard 43.The effect of keyboard 43 is that also it has a cover numerical key and a hardness test method key, is used for hardness test method and the test condition of determining that signal processing system will enter during on-test.For example, order button " HV ", " 1 ", " 0 ", " Enter ", system promptly enters the HV10 test method, test power 10kgf.
Pressure head 17 tops are one section right cylinder, with the center pit of pressing head seat 20 be transition fit, its cooperation has interchangeability, is convenient to change when pressure head 17 damages; Pressing head seat 20 middle part targeting parts are right cylinder, with pressing head seat lining 15 be clearance fit.Pressure head 17 tops also can cooperate with circular conical surface with pressing head seat 20, and 3 °～5 ° of cone angles are referring to Fig. 7.
When the Vickers hardness of testing large ferromagnetism plane sample or little load Vickers hardness, magnetic switch 32 closes, and only need take off bearing plate 30, magnet base 31 directly is adsorbed in large-scale ferromagnetism plane sample, to constitute force-closed framework.
Referring to Fig. 8.In the test, when the Vickers hardness of small column interview sample or little load Vickers hardness, can on bearing plate 30, offer two pilot holes in advance with instrument transverse axis, longitudinal axis symmetry, lining has the band pin V-arrangement cushion block 47 of two register pins 48 with the bottom, and adjustment Vickers pressure head, two diagonal line of impression are equated with the angle of cut of sample axis, or one parallel, one vertical so that sample face of cylinder hardness number is modified to the plane hardness number.
Referring to Fig. 9.When Fig. 9 is test equal diameter large cylindrical face ferromagnetism sample Vickers hardness or little load Vickers hardness, the embodiment (shown in the solid line) of magnet base 31 substructures and template 49 (shown in the dotted line) embodiment is arranged.During the hardness of test equal diameter large cylindrical interview sample 50, magnet base 31 bottoms make with tested sample 50 shapes mutually.Also can be with the template shown in the dotted line 49 as bearing plate, the axis of template 49 axis and tested sample 50 is placed consistent, to constitute force-closed framework.
Referring to Figure 10.When testing the Vickers hardness of equal diameter large cylindrical face ferromagnetism sample 52 not or little load Vickers hardness,, flared structure is made in magnet base 31 bottoms.Also can be with the template shown in the dotted line 51 as bearing plate, the axis of frame transverse axis and tested sample 52 is placed consistent, to constitute force-closed framework.
Referring to Figure 11.When Figure 11 is test ultra-large type face of cylinder ferromagnetism sample Vickers hardness or little load Vickers hardness, the embodiment of magnet base 31 bottom templates 53 structures.When testing the hardness of ultra-large type face of cylinder sample 54, as bearing plate, frame is laterally on the circumference of sample 54, to constitute force-closed framework with template 53.
Referring to Figure 12.After obtaining the Vickers hardness test value, as the result being converted to the hardness number of other scale commonly used, directly on keyboard 43, press " conversion " key earlier, make system enter transition status, button is selected the test method (for example " HB ") that need convert to and is selected test condition (for example " 2 " successively again, "/", " 1 ", " 2 ", " 0 "), send the instruction of the hardness scale (being HB2/120) that need convert to microcomputer 44, microcomputer 44 is according to the Vickers hardness number and other hardness number conversion table that pre-deposit in the read only memory ROM 55, determine the hardness number of the hardness scale (HB2/120) that converts to, and handle according to new scale, show, storage.
Sclerometer provided by the present invention is particularly suitable for making portable small-sizedization structure, both can use at fixed-sites such as laboratories, can be carried into on-the-spot the use again; Highly versatile has interchangeability, not only can make Vickers and low-load Vickers hardness test, and after changing pressure head 17, can do little load Bu Shi, Rockwell, surface rockwell hardness test; Directly the hardness of test sample also can be carried out the conversion between each scale hardness number when needed; The scope of application to specimen size and shape is big, can carry out in each metalloid, the plane and the face of cylinder hardness test of small sample, also can carry out plane and face of cylinder hardness test large-scale, ultra-large type ferromagnetism sample; The digitized degree height, the online test validity that carries out is judged, the online trial value of obtaining, and have demonstration, memory function.
Should be understood that, interchangeable pressure head 17 of the present invention is an assembled with pressing head seat 20, therefore only need to keep pressure head 17 constant with the fiting property of pressing head seat 20, pressure head 17 is replaced with after working portion meets other kind of the pressure head that corresponding hardness test method requires, the same little load Bu Shi that directly tests various types of materials plane and face of cylinder sample that adapts to, Rockwell, the surface rockwell hardness test is (in the test, during small column interview sample, bearing plate 30 should serve as a contrast with the bottom the protruding V-arrangement cushion block 46 of being with of boss, center pit clearance fit with the boss and the bearing plate bearing plate 30 of protruding V-arrangement cushion block 46, as shown in figure 13), for example be replaced with after the protruding spherical radius in working end shown in Figure 14 is the pressure head of R1, just can do the Brinell test (as " HB2/120 ") of D=2mm series, test findings can convert the hardness number of other scale in a like fashion to.
Claims (3)
1, the full digital Vickers of the convertible scale of a kind of test findings is characterized in that, it comprises that one of a frame is installed on the test force loading device by worm gear (4) worm screw (27) transmission in the frame; A force transducer (8) that is connected with the test force loading device; A measuring head moves synchronous displacement transducer (10) with the pressure head (17) that can change; It also has a force transducer and displacement transducer signal, data handling system, comprise: force transducer (8), amplifier (37), sampling holding device (S/H) and analog/digital (A/D) converter (40), displacement transducer (10), amplifier (38), sampling holding device (S/H) and analog/digital (A/D) converter (41), clock driver (39), random access memory ram (42), microcomputer (44), display (45), read only memory ROM (55), keyboard (43); Wherein, force transducer (8) output signal is after amplifier (37) amplifies, with passing to sampling holding device (S/H) and analog/digital (A/D) converter (40) with the synchronous mode of the clock signal of clock driver (39), by 50～100 times/second frequency samplings, the conversion of analog/digital (A/D) converter, be converted to addition behind the digital quantity, the result is as test power; Displacement transducer (10) output signal after amplifier (38) amplifies, signals sampling, and analog/digital (A/D) conversion all under the synchronization of clock signals control of clock driver (39), carry out; Displacement transducer (10) sample frequency is identical with the sample frequency of force transducer (8);
Keyboard (43) is provided with hardness test method key and numerical key, and signal processing system will enter when on-test hardness test method and test condition are determined by the hardness test method key and the numerical key of keyboard (43); Keyboard (43) is gone up also has " Enter " key, after loading procedure finishes, when test power is offloaded to setting,, carry out that hardness number is calculated, the validity of test is judged, test findings shows and storage by the execution sequence of " Enter " key control microcomputer (44) of keyboard (43);
" conversion " key is arranged on the keyboard (43), determine that by " conversion " key system enters transition status; The hardness test method and the test condition that need convert to are determined by the hardness test method key and the numerical key of keyboard (43) successively; After microcomputer (44) is received the instruction of " conversion " hardness test method and test condition, be to change according to pre-depositing the Vickers hardness number in the read only memory ROM (55) and the conversion table of other hardness number, and according to new scale handle, show, storage.
2, sclerometer according to claim 1, it is characterized in that, described frame is a cabinet rack, and it mainly is made up of with the spreading cover (13) of fixedlying connected with its lower end support (5), and a upper and lower back and a fixing force-closed framework of frame of sliding of energy is arranged on this frame; The described test force loading device that is installed in the frame, its worm screw lower support (25) is fixed in the support (5), worm-wheel shaft (6) lower end is connected with force transducer seat (7) screwed hole of centre, constitute the power transmission screw thread pair, force transducer (8) is positioned between force transducer seat (7) and the pressing plate (12), and pressure head (17) is by pressure head lining (15) location that is fixed on spreading cover (13) lower end center pit; Described displacement transducer (10) is in worm-wheel shaft (6) below, its lower end often contacts with pressure head (17) or pressing head seat (20) upper end, the housing of displacement transducer (10) is by support plate (22) location, and this support plate (22) is to fixedly connected with spreading cover (13) by support column (21).
3, sclerometer according to claim 1 and 2 is characterized in that, have one for the degree of depth of measuring pressure head (17) pressing in sample (16) preset displacement, be fixed on pressure head lining (15) and go up and keep and the contacted sheath of sample (16) (18); When Vickers hardness test, unclamp locking handwheel (35), mobile support (5) makes sheath (18) contact sample (16), and pressure head moves on (17), makes displacement transducer (10) obtain the displacement that presets of the degree of depth suitable, that supply measurement pressure head (17) pressing in sample (16).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100126222A CN1322321C (en) | 2004-01-06 | 2004-01-06 | Full digital type vickers hardness scale capable of converting dial of experimental result |
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| CNB2004100126222A CN1322321C (en) | 2004-01-06 | 2004-01-06 | Full digital type vickers hardness scale capable of converting dial of experimental result |
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| CN1322321C true CN1322321C (en) | 2007-06-20 |
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| CN101839832B (en) * | 2009-03-19 | 2012-03-28 | 鸿富锦精密工业（深圳）有限公司 | Vickers hardness test system and method |
| CN105136453B (en) * | 2015-09-30 | 2017-11-24 | 浙江万里扬股份有限公司 | A kind of transmission selector fork strength test system |
| CN111220490A (en) * | 2018-11-26 | 2020-06-02 | 青海大学 | Method for testing hardness of metal sheet sample |
| CN110260771A (en) * | 2019-06-24 | 2019-09-20 | 浙江工业大学 | The installs fixture of non-contact displacement transducer suitable for Portable press fit instrument |
| CN112255091B (en) * | 2020-09-03 | 2022-03-29 | 黑旋风锯业股份有限公司 | Hardness meter tray for detecting thin steel plate and detection method thereof |
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| CN2453428Y (en) * | 2000-11-30 | 2001-10-10 | 武汉大学 | Digital and universal type instrument for testing hardness |
| CN2503477Y (en) * | 2001-09-29 | 2002-07-31 | 时代集团公司 | Autoamtic rockwell apparatus |
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2004
- 2004-01-06 CN CNB2004100126222A patent/CN1322321C/en not_active Expired - Fee Related
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| CN2043357U (en) * | 1989-01-13 | 1989-08-23 | 栾健雄 | Hand-held hardness tester |
| CN2067450U (en) * | 1990-04-09 | 1990-12-12 | 程佐玉 | Special vertical support for portable hardnessmeter |
| CN2134577Y (en) * | 1991-11-25 | 1993-05-26 | 中国石化总公司兰州炼油化工总厂 | Clamping apparatus for quick plug |
| JPH10197433A (en) * | 1997-01-08 | 1998-07-31 | Shimadzu Corp | Surface hardness measuring instrument |
| JP2000292332A (en) * | 1999-04-07 | 2000-10-20 | Keiai Suzuki | Hardness measuring head and hardness measuring device |
| CN2453428Y (en) * | 2000-11-30 | 2001-10-10 | 武汉大学 | Digital and universal type instrument for testing hardness |
| CN2503477Y (en) * | 2001-09-29 | 2002-07-31 | 时代集团公司 | Autoamtic rockwell apparatus |
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| Title |
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| 维氏硬度计数字化原理 邢思明，郧建平，武汉大学学报（工学版），第35卷第1期 2002 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1556386A (en) | 2004-12-22 |
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