CN86207156U - Measuring device for disruptive strength of granular nonmetallic fragile material - Google Patents
Measuring device for disruptive strength of granular nonmetallic fragile material Download PDFInfo
- Publication number
- CN86207156U CN86207156U CN 86207156 CN86207156U CN86207156U CN 86207156 U CN86207156 U CN 86207156U CN 86207156 CN86207156 CN 86207156 CN 86207156 U CN86207156 U CN 86207156U CN 86207156 U CN86207156 U CN 86207156U
- Authority
- CN
- China
- Prior art keywords
- piezoelectric crystal
- force cell
- slide unit
- rolling guide
- graininess
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a measuring device for disruptive strength of granular nonmetallic fragile material. During the testing situation, the disruptive force for extruding and crushing the granular nonmetallic material is passed to the piezo crystal load cell to detect the force signal through the sliding table on the rolling guide, and then the force signal is input onto the signal processing system to carry out the data processing. The rolling guide and the piezo crystal load cell are both mounted at the socket, and the piezo crystal load cell is closely contacted with one end of the sliding table mounted at the rolling guide. The utility model can raise the effective usage period more than 2 times, reduce the test signal distortion, and raise the testing efficiency more than 10 times.
Description
The utility model belongs to nonmetal hard brittle material physical attribute and identifies the field.
Along with the nonmetal hard brittle material of graininess is widely used in industries such as machinery, building, people also more and more pay close attention to the mensuration of its breaking strength.The breaking strength of the nonmetal hard brittle material of graininess belongs to a kind of STATISTICAL STRENGTH, require to measure the small-particulate materials of some, and the survey data are carried out statistical treatment, and the statistical value after the statistical treatment is promptly as the breaking strength value of this kind material.Particle diameter is little because institute measures and monitor the growth of standing timber material, and the test figure place is many, thus work loaded down with trivial details, test labour intensity is bigger, and the quality of proving installation has direct influence to the authenticity of measured result.
" Annals of the CIRP " (1973 the 22nd the 2nd phases of volume, 219-225 page or leaf) reported the test unit of a kind of abrasive material (category of the nonmetal hard brittle material of metal particles shape) strength detection.Abrasive material is sent into gap between the two wimet rollers that horizontal parallel places by vibration feeder, and wherein drive roll is turned round with certain speed by driven by motor, and driven voller is in circumferential free state.When abrasive material passes through the gap, abrasive material is subjected to the extruding of two rollers and fragmentation, the semiconductor strain measuring bridge that the crushing force signal is made up of the foil gauge that sticks on the driven voller support side outputs to oscillograph recording and gets off, then, the data that oscillograph recording is got off are carried out artificial treatment, obtain abrasive material breaking strength index.
The weak point of this device is:
1. install the problem of rigidity and sensitivity.Because of desire obtains bigger sensitivity, i.e. bigger bending stress, just the sufficiently long arm of force must be arranged, producing enough big moment of flexure, but the growth of the arm of force can cause the rigidity reduction of driven voller support again, makes the crushing force signal that distortion easily take place.
2. artificial treatment data complexity, loaded down with trivial details and elapsed time is many.
3. foil gauge barbola work complexity, and moisture-sensitive causes resistance to change, and every use a period of time need be changed foil gauge and demarcate again, and effectively life cycle is short.
The purpose of this utility model is to improve above-mentioned weak point, proposes the determinator of the new nonmetal hard brittle material breaking strength of graininess.
Content of the present utility model comprises: drive roll, driven voller, motor, slide unit, threaded adjustment mechanisms, piezoelectric crystal force cell, rolling guide, base, signal processing system.Piezoelectric crystal force cell and rolling guide are contained on the base, slide unit is housed on rolling guide, slide unit one end is equipped with driven voller, the piezoelectric crystal force cell closely contacts with the other end of slide unit, this contact can be to adopt the some contact, guarantees the action direction of the crushing force of surveying and the central lines of piezoelectric crystal chip.In the piezoelectric crystal force cell piezoelectric crystal chip can be housed, signal processing system links to each other with the piezoelectric crystal force cell.Signal processing system can adopt charge amplifier, amplifying circuit, and sampling hold circuit, analog to digital converter, single card microcomputer and mini-printer are formed.
The utility model has the advantages that:
1. avoided the contradiction between device sensitivity and the rigidity.The utility model adopts piezoelectric crystal force cell and slide unit as power transmission part, because the rigidity of piezoelectric crystal force cell is better, and is close proximity to slide unit, form the rigidity contact, the test signal degree of distortion is reduced, enough rigidity was arranged but also can reach effectively good sensitivity so not only can satisfy.
2. graininess hard brittle material abrasive material input determinator can obtain disposable net result, and whole test process only needs tens minutes, and the signal processing system deal with data is accurately rapid, can alleviate tester's burden, and testing efficiency improves more than ten times.
3. prolonged the life cycle of device.The piezoelectric crystal long service life, convenient mounting and clamping, general foil gauge is changed once half a year, and available at least 2 years of piezoelectric crystal force cell, calibration again again, effective service life, can improve more than 2 times.
Description of drawings and utility model embodiment
Accompanying drawing is the determinator synoptic diagram of the nonmetal hard brittle material breaking strength of graininess.
Drive roll (2) and driven voller (3) are made by hard material, are carved with equally spaced shallow slot on the periphery of two rollers, and drive roll (2) turns round with certain speed under motor (4) drives.Driven voller (3) is in circumferential free state, and driven voller is installed in an end of slide unit (5), and slide unit (5) is contained on the rolling guide (7), and rolling guide (7) and piezoelectric crystal force cell (8) all are contained on the base (10).The other end of slide unit (5) contacts with piezoelectric crystal force cell (8) stiff points, with the action direction of assurance abrasive material crushing force and the central lines of piezoelectric crystal chip (9).Certain clearance δ is arranged between the driving and driven roller, and gap delta can be adjusted by threaded adjustment mechanisms (6), can be the 0.25-4 millimeter usually with the nonmetal hard brittle material abrasive material of adaptive testing particles of different sizes shape diameter.When the nonmetal hard brittle material of graininess (1) passes through gap delta, be subjected to the extruding of two rollers and fragmentation, its crushing force signal is delivered on the piezoelectric crystal force cell (8) through slide unit (5), output to charge amplifier (11) through piezoelectric crystal chip (9) and carry out conversion of signals, with crushing force quantity of electric charge signal transition is voltage signal, after range amplifying circuit (12) amplifies, to be similar to the crushing force voltage signal peak value maintenance of pulse signal again by sampling hold circuit (13), then by the CMC-80 micro computer, be that modulus changes commentaries on classics device (14), single card microcomputer (15) carries out analog to digital conversion and data processing.Finally the breaking strength index is printed by mini-printer (16).
Adopt the nonmetal hard brittle material breaking strength of graininess determinator, two kinds of brown corundum abrasive GZ8#, GZ24# are measured, test sample respectively is 100, and the gained result is as follows in the test back:
In the above-mentioned table:
Crushing force
The crushing force of Pi---single abrasive material.
Crushing force meansquaredeviation: σ=
The dispersion degree S:S=of crushing force
* 100%
Breaking strength σ e: σ e=1.37 P/a
2
The equivalent grain size of a---abrasive material
A=abrasive material mean diameter * 80%.
Claims (3)
1, the determinator of the nonmetal hard brittle material breaking strength of a kind of graininess, comprise drive roll (2), driven voller (3), motor (4), threaded adjustment mechanisms (6), base (10), drive roll (2) is driven by motor (4), it is characterized in that this device also includes signal processing system, this signal processing system links to each other with piezoelectric crystal force cell (8), piezoelectric crystal force cell (8) and rolling guide (7) are contained on the base (10), slide unit (5) is housed on rolling guide (7), one end of slide unit (5) is equipped with driven voller (3), and piezoelectric crystal force cell (8) closely contacts with the other end of slide unit (5).
2, the nonmetal hard brittle material breaking strength of a kind of graininess as claimed in claim 1 determinator, it is characterized in that in said piezoelectric crystal force cell (8), being equipped with piezoelectric crystal chip (9), piezoelectric crystal force cell (8) adopts point to contact with slide unit (5), guarantees the action direction of the crushing force of surveying and the central lines of piezoelectric crystal chip (8).
3, the nonmetal hard brittle material breaking strength of a kind of graininess as claimed in claim 2 determinator, it is characterized in that this signal processing system is by charge amplifier (11), amplifying circuit (12), sampling hold circuit (13), analog to digital converter (14), single card microcomputer (15) and mini-printer (16) are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207156 CN86207156U (en) | 1986-09-20 | 1986-09-20 | Measuring device for disruptive strength of granular nonmetallic fragile material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207156 CN86207156U (en) | 1986-09-20 | 1986-09-20 | Measuring device for disruptive strength of granular nonmetallic fragile material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86207156U true CN86207156U (en) | 1987-09-16 |
Family
ID=4809641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86207156 Ceased CN86207156U (en) | 1986-09-20 | 1986-09-20 | Measuring device for disruptive strength of granular nonmetallic fragile material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86207156U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487782B (en) * | 2008-01-17 | 2011-07-27 | 北京东孚久恒仪器技术有限公司 | Cereal particle hardness measurement method and its hardness measurement instrument |
| CN108362585A (en) * | 2018-02-02 | 2018-08-03 | 中国农业大学 | Potato soil separation test platform for the test of potato collsion damage |
-
1986
- 1986-09-20 CN CN 86207156 patent/CN86207156U/en not_active Ceased
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101487782B (en) * | 2008-01-17 | 2011-07-27 | 北京东孚久恒仪器技术有限公司 | Cereal particle hardness measurement method and its hardness measurement instrument |
| CN108362585A (en) * | 2018-02-02 | 2018-08-03 | 中国农业大学 | Potato soil separation test platform for the test of potato collsion damage |
| CN108362585B (en) * | 2018-02-02 | 2020-03-31 | 中国农业大学 | Potato-soil separation test platform for potato collision damage test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |