CN108693059A - Hardness measuring device and hardness measurement method - Google Patents
Hardness measuring device and hardness measurement method Download PDFInfo
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- CN108693059A CN108693059A CN201810403500.8A CN201810403500A CN108693059A CN 108693059 A CN108693059 A CN 108693059A CN 201810403500 A CN201810403500 A CN 201810403500A CN 108693059 A CN108693059 A CN 108693059A
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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
- G01N3/48—Investigating hardness or rebound hardness by performing impressions under impulsive load by indentors, e.g. falling ball
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0076—Hardness, compressibility or resistance to crushing
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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
- G01N2203/0688—Time or frequency
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention relates to hardness test technical field, a kind of hardness measuring device and hardness measurement method are disclosed.The hardness measuring device includes:Test ball (1), the first passage slid for realizing test ball and the second channel (9) for realizing the test horizontal linear uniform motion of ball, the first passage includes the 1/4 circular arc channel (4) for having vertical entrance and horizontal outlet, the outlet in 1/4 circular arc channel intersects with the entrance of second channel and forms the interconnecting piece being connected, the interconnecting piece has the free end that the outlet far from second channel extends, the free end leans with material to be detected, the second channel is equipped with the measuring cell that the time used in any section on second channel is spent for monitoring and test ball warp.The present invention converts fuzzy hardness number measurement to clear time measurement on the basis of measuring the Shore method of metal hardness, effectively improves the precision and accuracy of measurement so that finally obtained hardness number is more accurate.
Description
Technical field
The invention belongs to hardness test technical fields, more particularly to a kind of hardness measuring device and hardness measurement method.
Background technology
Traditional construction material Determination of Hardness method only collides the number of sample or the depth representing of metal impression with bead
Its hardness, this method manual operations is complicated, and instrument efficiency is low, and accuracy is not high enough, it is easy to the fatigue of operating personnel is caused,
Error is larger, has been not suitable with the demand of current social development.
Currently, the Determination of Hardness of construction material is the most widely used or Shore method, mainly by a bead from one
Determine height free-falling, hit sample, sample is harder, bead strike sample consumption is smaller in the energy of broken sample, then bead
The ability of rebound is bigger, and the hardness of the test specimen is denoted as with the ratio of the height of rebound and elemental height when release bead.But it is this
It can only be measured in vertical direction in method, the flatness of specimen surface can influence the rebound height of bead.
In the prior art, hardometer is also commonly used and carries out hardness measurement, the original of impression is then measured using static reinforcing
Reason, Rockwell apparatus are to measure depth of cup to directly display hardness number;Brinell hardness tester is to measure impression diameter, tables look-up or calculates
Go out hardness number;Vickers is to measure impression catercorner length, tables look-up or calculate hardness number.But these devices are general
It can only all use under lab, and smallclothes test specimen can only be measured, for the construction material or building element in construction site, need
Test in laboratory hardness is taken after sampling.Therefore, these hardometer working efficiencies are also very low, smaller scope of application.
Invention content
The purpose of the invention is to overcome the problems, such as that testing efficiency of the existing technology is low, precision is not high, one is provided
Kind hardness measuring device, the device convert fuzzy hardness number measurement to clearly time measurement, can effectively improve measurement
Precision and accuracy.
To achieve the goals above, one aspect of the present invention provides a kind of hardness measuring device, including:Test ball, for real
The first passage that the existing test ball slides and the second channel for realizing the test horizontal linear uniform motion of ball, institute
State the 1/4 circular arc channel that first passage includes the outlet with vertical entrance and level, and the entrance in 1/4 circular arc channel
Higher than the outlet in 1/4 circular arc channel, outlet and the entrance of the second channel in 1/4 circular arc channel intersect and shape
At the interconnecting piece being connected, the interconnecting piece has the extending direction along the second channel far from the outlet of the second channel
The free end of extension, the free end are provided on the second channel for monitoring for leaning with material to be detected
State the measuring cell of the time on the test excessively described second channel of ball warp used in any section.
Preferably, the measuring cell includes being successively set on the second channel along the direction of motion for testing ball
The first photoelectric door and the second photoelectric door, the hardness measuring device includes for receiving first photoelectric door and described second
The feedback signal of photoelectric door and the control unit for calculating the material hardness value to be detected.
Preferably, the hardness measuring device includes digital display, the digital display and described control unit phase
Even.
Preferably, the first passage include vertically upwardly extended from the entrance in 1/4 circular arc channel it is slow
Channel is rushed, setting is opened wide in the outlet of the second channel.
Preferably, the interconnecting piece is provided with third photoelectric door with the material place of leaning to be detected, and the control is single
First to be connected with the third photoelectric door, signal for receiving third photoelectric door feedback simultaneously passes through to calculate and sets the buffering
The height value in channel.
Preferably, the top of the buffer channel is equipped with the lock for releasedly fixing the test ball, the lock packet
It includes the drawable baffle for being located at the buffer channel top and the limiting plate in baffle both sides, two limits is set
Plate constitutes the uncovered structure that open top is more than bottom opening.
Preferably, the second channel includes air cushion guide groove, and the air cushion guide groove is described for being connected with small-sized air source
The surface of air cushion guide groove is equipped with for supplying so that the test ball is in the venthole of suspended state.
Preferably, the first passage and the second channel are commonly through the height being arranged in the second channel bottom
Regulating device carries out height adjusting.
Second aspect of the present invention provides a kind of hardness measurement method, and described method includes following steps:
S1, by the test ball with initial velocity be 0, initial vertical state from the height be the position free-falling of R, and
Make to fall behind under the test ball and is skidded off with horizontality and make reversed horizontal linear uniform motion after being hit with material to be detected;
S2, the measurement test ball pass through the time t1 used in any section during horizontal linear uniform motion and should
The distance s in section;
S3, according to known s, t1, R, substitute into formulaIn obtain the hardness number of the material to be detected.
Preferably, the hardness measurement method is completed by hardness measuring device described in claim 1, wherein:Step
S1 includes sliding the test ball along the first passage for 0 with initial velocity.
Preferably, the method includes carrying out debugging step S0, the step S0 before the step S1 to include:
The material to be detected is taken away;
In the interconnecting piece and the material place of leaning to be detected, third photoelectric door is set;
The test ball is slid for 0 along the first passage with initial velocity, the test ball is measured and passes through the third
The time t of photoelectric door0, utilize t0The test wink of the ball by the third photoelectric door is calculated with the diameter d of the test ball
Shi Sudu
The 1/4 circular arc feeder connection is vertically upwardly extended to the buffer channel that one height of setting is h ', institute
Stating buffer channel height value is:
Preferably, by the test top free-falling of the ball from the buffer channel in the step S1.
Through the above technical solutions, the hardness number that the present invention on the basis of measuring the Shore method of metal hardness, will obscure
Measurement is converted into clearly time measurement, can effectively improve the precision and accuracy of measurement so that finally obtained hardness number is more
Add accurate.
Description of the drawings
Fig. 1 is the structural schematic diagram of one embodiment of the present invention;
Fig. 2 is the work flow diagram of digital display in the present invention.
Reference sign
1-test ball, 2-locks, 3-buffer channels, 4-circular arc channels, 5-ventholes, 6-third photoelectric doors, 7-
First photoelectric door, the 8-the second photoelectric door, 9-second channels, 10-accommodating grooves, 11-babinets, 12-conducting wires, 13-numbers are aobvious
Show device, 14-height adjustment device, 15-small-sized air sources, 16-valves, 17-supporting rods.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
In conjunction with Fig. 1, a kind of hardness measuring device is provided according to an aspect of the present invention, including:Test ball 1, for realizing
The first passage that the test ball slides and the second channel 9 for realizing the test horizontal linear uniform motion of ball, institute
To state first passage include the 1/4 circular arc channel 4 for having vertical entrance and horizontal outlet, and 1/4 circular arc channel 4 enters
Mouth is higher than the outlet in 1/4 circular arc channel 4, and the outlet in 1/4 circular arc channel 4 is intersected with the entrance of the second channel 9
The interconnecting piece being connected is pitched and is formed, the interconnecting piece has the extending direction along the second channel far from the second channel
The free end that 9 outlet extends, the free end are arranged useful for leaning with material to be detected on the second channel 9
In the measuring cell for monitoring the time on the test excessively described second channel 9 of ball warp used in any section.
It is that the potential energy of the test ball 1 is completely converted into kinetic energy that the effect in 1/4 circular arc channel is used in the present invention.Test
When, the free end of the material to be detected and the interconnecting piece is leant first, allows the test ball 1 from 1/4 circular arc
The vertical inlet free-falling in channel 4 is then skidded off from the Horizontal Exit of the first passage after striking material to be detected
Make reversed horizontal linear uniform motion in the second channel 9, the test ball 1 is monitored finally by the measuring cell
By the time used in any section on the second channel 9.
It is obtained according to Shore hardness principle as follows:
Wherein, K is Shore hardness coefficient, is constant.For traditional hardness measuring method, h1It is vertical for test ball
Hit the vertical height after material rebound to be detected;And h0Vertical height before falling for test ball;But due in the present invention
Test device structure be different from conventional apparatus, be attached in the present invention, whole device can be rotated by 90 ° counterclockwise so that institute
It states material to be tested and is placed in level ground and carry out analogy, the h after analogy1As the test ball 1 hits edge after material to be tested
The length that the second channel 9 moves, the h0As 1/4 circular arc channel, 4 top inlet is relative to the material to be tested
The vertical range of material.
In above-mentioned test process, s is set as the length in the section, v2With initial velocity it is 0 described for the test ball 1
Fall the ball rebound velocity after hitting material to be detected at 1/4 circular arc feeder connection, and R is the radius in 1/4 circular arc channel, is passed through
It is t that the measuring cell, which measures the test ball 1 by the time used in the section,1。
It is obtained according to law of conservation of energy as follows:
Further, it is obtained by formula 1, formula 2 and formula 3:
Hardness
To sum up, the time used in the section is passed through by the measurement test ball 1 using in this measuring device test process
t1, in conjunction with the radius R of the length s and 1/4 circular arc channel in the section, you can calculate the hard of material to be tested by above-mentioned formula
Angle value.
The present invention is on the basis of measuring the Shore method of metal hardness, when converting clearly fuzzy hardness number measurement to
Between measure, the precision and accuracy of measurement can be effectively improved so that finally obtained hardness number is more accurate.And use the survey
It is not limited to the measurement of traditional vertical direction in amount device measurement process, passes through and channel is set so that measurement result will not be by
The influence of material surface flatness to be detected has many advantages, such as that measurement is convenient, is widely used, for the construction material in construction site
Or building element is equally applicable.Further, since material to be detected is placed in the side of the measuring device, material to be detected after measurement
On hardly generate impression, can be used for finished product measurement.
According to the record in above-mentioned test process, the test ball 1 is by the time t used in any section1It is to pass through survey
Amount element monitors, and measuring cell here can use timer to carry out Split Time, or for realize it is more convenient from
Dynamic timing, in the present embodiment, the measuring cell includes that be successively set on described second logical along the direction of motion of the test ball 1
The first photoelectric door 7 on road 9 and the second photoelectric door 8, the hardness measuring device include for receiving 7 He of the first photoelectric door
The feedback signal of second photoelectric door 8 and the control unit for calculating the material hardness value to be detected.
In the course of work, start timing, second photoelectric door 8 when first photoelectric door 7 is by test 1 shading of ball
Stop timing when by test 1 shading of ball, timing signal is fed back to described control unit, the control by two photoelectric doors jointly
Unit processed is the recordable test ball 1 by used in the section between first photoelectric door 7 and second photoelectric door 8
Time t1, since length, that is, the distance between first photoelectric door 7 and second photoelectric door 8 s in above-mentioned section and 1/4 justifies
The radius R in arc channel is two given datas, further, described control unit can be enable according to above-mentioned by setting
The formula derivedCalculate the hardness number of the material to be tested.
In order to it is more intuitive, easily above-mentioned result of calculation shown, the hardness measuring device includes that number is shown
Device 13, the digital display 13 are connected with described control unit, therefore the digital display 13 just can be by the control
The calculated hardness number of unit is shown so that reading is more convenient, reduces error.
Not interfere movement of the test ball 1 in the second channel 9, the outlet of the second channel 9, which is opened wide, to be set
It sets, for convenience of the recycling of the test ball 1, containing box 10 is further fixedly arranged in the exit of the second channel 9.
As a preferred embodiment of the present invention, it is contemplated that in measurement process, the test ball 1 can also when falling
By the friction effects in 1/4 circular arc channel 4, therefore final measurement result can be caused there are certain errors.For into one
The guarantee of step measure precisely, reduce error to the greatest extent, measuring device of the present invention need to be debugged, specifically, institute
It includes the buffer channel 3 vertically upwardly extended from the entrance in 1/4 circular arc channel to state first passage.
This is because, the test ball 1 can be utilized to overcome frictional resistance by the gravitional force counteracting of the buffer channel 3
Work(W made by ff, wherein g is acceleration of gravity, takes g=9.8m/s2;It will be positioned at the material to be tested of the interconnecting piece free end
It takes away, sets v0Pass through the connection from 1/4 circular arc channel, the 4 top free skating backwardness that vertical height is R for the test ball 1
The instantaneous velocity of portion free end, is obtained by law of conservation of energy:
Mgh '=Wf..........................(5)
It is obtained by (4) (5) formula:
Therefore vertically upwardly extending one section of height by the entrance in 1/4 circular arc channel is
Buffer channel 3 so that the test ball 1 can just offset the test ball 1 in the gravitional force saved by h ' of height
In 1/4 circular arc channel 4 thus movement is just completed system debug, most by the portion of energy that frictional force f is influenced and is lost
Whole Hardness Measurement Results deviation levels off to 0.
Further, v is obtained for convenience0Numerical value, in the interconnecting piece and the material place of the leaning to be detected setting
There are third photoelectric door 6, described control unit to be connected with the third photoelectric door 6, for receiving the feedback of third photoelectric door 6
Signal and the height value that the buffer channel 3 is set by calculating.
After the material to be detected is taken away, start timing when the third photoelectric door 6 is by test 1 shading of ball, institute
Stop timing when stating third 6 exposure of photoelectric door, during this, it is the straight of the test ball 1 that the test ball 1, which passes through distance,
Timing signal is fed back to described control unit by diameter d, the third photoelectric door 6, and it is logical that described control unit records the test ball 1
The time for crossing the third photoelectric door 6 is t0, thus according toV can directly be calculated0Numerical value, bring intoIn obtainFurther, it again may be by setting and enable described control unit root
According toCalculate the height value of the buffer channel 3.
It is further, mutual for anti-stop signal since described control unit can receive the feedback signal of three photoelectric doors
Between interfere, setting A gear and B gear.The material to be tested is taken away, the control in conjunction with Fig. 2 when being switched to A gears
Unit is connected to the third photoelectric door 6, the feedback signal for receiving the third photoelectric door 6, and according to formulaThe height value for setting the buffer channel 3 debugs the test device.Wherein, the buffering is calculated
The height value in channel 3 can be shown by digital display unit 13.
After debugging, 1/4 circular arc channel 4 is upwardly extended into the buffer channel 3 that one section of height is h ', is subsequently handed to B
When gear so that described control unit is connected to first photoelectric door 7 and second photoelectric door 8, allows the test ball 1 from institute
The top free-falling for stating buffer channel 3, along institute after 4 level skids off the shock material to be tested through 1/4 circular arc channel
It states second channel 9 and makees horizontal linear uniform motion, described control unit is used to receive described the be located on the second channel 9
The feedback signal of one photoelectric door 7 and second photoelectric door 8, and can be according to formulaCalculate described wait for
The hardness number of test material is shown eventually by digital display 13.
In the above process, for convenience of by it is described test ball 1 be positioned over the buffer channel 3 top and simultaneously can be real
Existing subsequent release is fallen, and the lock 2 for releasedly fixing the test ball is equipped on the top of the buffer channel 3, described
Lock 2 include positioned at 3 top of the buffer channel drawable baffle and limiting plate in baffle both sides is set, two
The limiting plate constitutes the uncovered structure that open top is more than bottom opening.
The uncovered structure can effectively prevent the rolling of test ball 1 to slide, and before whereabouts, close the baffle so that institute
The top inlet for stating buffer channel 3 is completely enclosed, prevents the landing of the test ball 1, when whereabouts, baffle described in pull so that
The top inlet of the buffer channel 3 opens wide, and the test ball 1 can enter described 1/4 along the buffer channel 3 and justify as a result,
Arc channel 4 and then completion subsequent motion.
To realize that the test ball 1 completes linear uniform motion in the second channel 9, the second channel 9 includes
Air cushion guide groove, the air cushion guide groove for being connected with small-sized air source 15, the surface of the air cushion guide groove be equipped with for supply with
The test ball 1 is set to be in the venthole 5 of suspended state.
Wherein, the small-sized air source 15 uses gas-supplying structure common in the art, in general can store 5L pressures
24V DC voltages or 220V AC voltage supply may be used when requiring supplementation with air source, mainly utilize described small for contracting air
The motor of type air source 15 drives centrifugal fan to continue to generate gas.Make the test ball 1 by the control of small-sized air source 15
In suspended state, i.e., gas is discharged in the described air cushion guide groove venthole 5 can be complete to power upward caused by the test ball 1
Test ball 1 gravity of itself is overcome entirely, so that the test ball 1 can wait in the second channel 9 to hit
It detects the speed after material and completes linear uniform motion.
Further, the shape of the air cushion guide groove can be totally-enclosed or concave semi-closed structure, preferably concave,
The completely open structure in top, ensure the test ball 1 can on the air cushion guide groove in suspended state and meanwhile from by
To the influence of other frictional resistance.
In addition, adapting to the height of the material to be detected for convenience, surveyed convenient for the hardness of immovable material to be detected
Amount, 9 bottom of the second channel be provided with height adjustment device 14, the first passage and the second channel 9 commonly through
The height adjustment device 14 carry out height be adjusted to suitable position so that the free end of the interconnecting piece just with it is described to be detected
Material leans.Here height adjustment device, which may be used, any in the prior art can realize that the structure of the adjusting has been come
At, such as common diamond shape manual height regulating device etc., it is not restricted herein.
The present invention also provides a kind of hardness measurement methods, and described method includes following steps:
S1, by the test ball 1 with initial velocity be 0, initial vertical state from the height be the position free-falling of R,
And makees reversed horizontal uniform rectilinear after so that described test 1 time backwardness of ball is skidded off with horizontality and is hit with material to be detected and transport
It is dynamic;
S2, the test ball 1 is measured during horizontal linear uniform motion by the time t used in any section1With
The distance s in the section;
S3, according to known s, t1, R, substitute into formulaIn obtain the hardness number of the material to be detected.
Measurement method of the present invention converts fuzzy hardness number measurement on the basis of measuring the Shore method of metal hardness
Clearly the time measures, and can effectively improve the precision and accuracy of measurement, and different from being waited for described in traditional measurement method
Detection material horizontal is placed in ground, but material to be detected is placed on side, and by limiting being moved through for the test ball 1
Journey so that final measurement result will not be influenced by material surface flatness to be detected.
After completing above-mentioned steps S1, S2, obtained according to Shore hardness principle as follows:
Wherein, K is Shore hardness coefficient, is constant.For traditional hardness measuring method, h1It is vertical for test ball
Hit the vertical height after material rebound to be detected;And h0Vertical height before falling for test ball;But due in the present invention
Test method be different from traditional measurement, need the material to be tested being placed in level ground and carry out analogy, the h after analogy1
The as described test ball 1 hits the length of horizontal linear uniform motion after material to be tested, the h0As under the test ball 1
Vertical range, that is, R of the drop height degree between the material to be tested.
In above-mentioned test method, v is set2For the test ball 1 with initial velocity be 0 height be R fall hit it is to be detected
Ball rebound velocity after material obtains as follows according to law of conservation of energy:
Further, it is obtained by formula 1, formula 2 and formula 3:
Hardness
To sum up, measurement method through the invention can directly calculate the hardness number of material to be tested, in measurement process only
It needs to detect a data t1, convert fuzzy hardness number measurement to clearly time measurement, surveyed to effectively improve
The precision and accuracy of amount.
Further, the hardness measurement method is completed by hardness measuring device above-mentioned, wherein:Step S1 includes will
The test ball 1 is slid for 0 along the first passage with initial velocity, wherein the first passage includes 1/4 circular arc channel 4, institute
1/4 circular arc channel 4 is stated with vertical entrance and horizontal outlet, thus defines the movement locus of the test ball 1.
In view of in measurement method, the test ball 1 also suffers from the frictional force shadow in 1/4 circular arc channel when falling
Sound, therefore final measurement result can be caused there are certain error, it is that further guarantee measures accurate, maximum reduce
Error, the method includes carrying out debugging step S0, the step S0 before the step S1 to include:
The material to be detected is taken away;
In the interconnecting piece and the material place of the leaning setting third photoelectric door 6 to be detected;
With initial velocity it is 0 to be slid along the first passage by the test ball 1, measures the test ball 1 by described the
The time t of three photoelectric doors 60, utilize t0The test ball 1 is calculated by the third photoelectric door with the diameter d of the test ball
6 instantaneous velocity
1/4 circular arc channel, 4 entrance is vertically upwardly extended to the buffer channel 3 that one height of setting is h ',
3 height value of the buffer channel is:
Above-mentioned formulation process is not repeated herein with the formulation process in the measuring device above-mentioned
It is bright.After completing debugging, by the test top free-falling of the ball 1 from the buffer channel 3, through 1/4 circular arc channel, 4 water
Smoothly go out to hit and make horizontal linear uniform motion along the second channel 9 after the material to be tested, passes through described control unit
The feedback signal for receiving first photoelectric door 7 and second photoelectric door 8 that are located on the second channel 9 obtains described
The time for testing the section that ball 1 is s by length is t1, and can be according to formulaIt calculates described to be tested
The hardness number of material, it is ensured that finally obtained Hardness Measurement Results are precisely reliable, effectively avoid error.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited thereto.At this
In the range of the technology design of invention, a variety of simple variants, including each particular technique can be carried out to technical scheme of the present invention
Feature is combined in any suitable manner.In order to avoid unnecessary repetition, the present invention is to various combinations of possible ways
No longer separately illustrate.But it should also be regarded as the disclosure of the present invention for these simple variants and combination, belongs to the present invention
Protection domain.
Claims (12)
1. a kind of hardness measuring device, which is characterized in that including:First for testing ball (1), being slid for realizing the test ball
Channel and for realizing it is described test the horizontal linear uniform motion of ball second channel (9), the first passage include have
1/4 circular arc channel (4) of vertical entrance and horizontal outlet, and the entrance in 1/4 circular arc channel (4) is higher than described 1/4
The outlet in circular arc channel (4), the outlet in 1/4 circular arc channel (4) and the entrance of the second channel (9) intersect and are formed
The interconnecting piece being connected, the interconnecting piece have extending direction the going out far from the second channel (9) along the second channel
The free end that mouth extends, the free end are provided on the second channel (9) for supervising for leaning with material to be detected
Survey the measuring cell of the time on the test excessively described second channel (9) of ball warp used in any section.
2. hardness measuring device according to claim 1, which is characterized in that the measuring cell includes along the test ball
(1) the direction of motion is successively set on the first photoelectric door (7) and the second photoelectric door (8) on the second channel (9), described hard
Degree measuring device includes the feedback signal for receiving first photoelectric door (7) and second photoelectric door (8) and calculates institute
State the control unit of material hardness value to be detected.
3. hardness measuring device according to claim 2, which is characterized in that the hardness measuring device includes that number is shown
Device (13), the digital display (13) are connected with described control unit.
4. according to the hardness measuring device described in any one of claim 1-3, which is characterized in that the first passage includes
The buffer channel (3) vertically upwardly extended from the entrance in 1/4 circular arc channel, the outlet of the second channel (9)
Open wide setting.
5. hardness measuring device according to claim 4, which is characterized in that the interconnecting piece and the material phase to be detected
Place is provided with third photoelectric door (6), described control unit is connected with the third photoelectric door (6), for receiving described
The signal of three photoelectric doors (6) feedback and the height value that the buffer channel (3) is set by calculating.
6. hardness measuring device according to claim 4, which is characterized in that the top of the buffer channel (3) is equipped with can
The lock (2) of the fixed test ball in release ground, the lock (2) include be located at the buffer channel (3) top can pull
Baffle and limiting plate in baffle both sides is set, two limiting plates constitute open tops and are more than the spacious of bottom opening
Mouth structure.
7. hardness measuring device according to claim 1, which is characterized in that the second channel (9) includes air cushion guide groove,
For being connected with small-sized air source (15), the surface of the air cushion guide groove is equipped with for supplying so that the survey air cushion guide groove
Try (1) be in the venthole (5) of suspended state.
8. hardness measuring device according to claim 1, which is characterized in that the first passage and the second channel
(9) height adjustment device (14) commonly through setting in the second channel (9) bottom carries out height adjusting.
9. a kind of hardness measurement method, which is characterized in that described method includes following steps:
S1, by the test ball (1) with initial velocity be 0, initial vertical state from the height be the position free-falling of R, and
Make to fall behind under the test ball (1) to skid off with horizontality and make reversed horizontal uniform rectilinear after hitting with material to be detected and transport
It is dynamic;
S2, the measurement test ball (1) pass through the time t1 used in any section during horizontal linear uniform motion and should
The distance s in section;
S3, according to known s, t1, R, substitute into formulaIn obtain the hardness number of the material to be detected.
10. hardness measurement method according to claim 9, which is characterized in that the hardness measurement method is wanted by right
The hardness measuring device described in 1 is asked to complete, wherein:It with initial velocity is 0 along described first that step S1, which includes by the test ball (1),
Channel slides.
11. hardness measurement method according to claim 9, which is characterized in that the method includes the step S1 it
Preceding progress debugging step S0, the step S0 include:
The material to be detected is taken away;
In the interconnecting piece and the material place of the leaning setting third photoelectric door (6) to be detected;
With initial velocity it is 0 to be slid along the first passage by the test ball (1), measures the test ball (1) by described the
The time t of three photoelectric doors (6)0, utilize t0The test ball (1), which is calculated, with the diameter d of the test ball passes through the third light
The instantaneous velocity of electric switch (6)
1/4 circular arc channel (4) entrance is vertically upwardly extended to the buffer channel (3) that one height of setting is h ',
Buffer channel (3) height value is:
12. hardness measurement method according to claim 11, which is characterized in that by the test ball in the step S1
(1) from the top free-falling of the buffer channel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN109655360A (en) * | 2018-12-29 | 2019-04-19 | 天长市龙亨电子有限公司 | A kind of rigidity detection device of casing of electric vehicle controller |
| CN110132720A (en) * | 2019-06-10 | 2019-08-16 | 淮安市水利工程建设管理服务中心 | A kind of underwater reisilometer and its method detecting underwater concrete intensity |
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| CN206349031U (en) * | 2016-12-15 | 2017-07-21 | 上海工程技术大学 | A kind of experimental provision for verifying the law of conservation of momentum |
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| US20120085154A1 (en) * | 2010-10-06 | 2012-04-12 | Mitutoyo Corporation | Hardness tester |
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| CN110132720A (en) * | 2019-06-10 | 2019-08-16 | 淮安市水利工程建设管理服务中心 | A kind of underwater reisilometer and its method detecting underwater concrete intensity |
| CN110132720B (en) * | 2019-06-10 | 2021-12-21 | 淮安市水利工程建设管理服务中心 | Underwater resiliometer for detecting strength of underwater concrete and method thereof |
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Application publication date: 20181023 |