CN105403484B - The measuring device and measuring method of a kind of powder fluidity and compressibility - Google Patents
The measuring device and measuring method of a kind of powder fluidity and compressibility Download PDFInfo
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- CN105403484B CN105403484B CN201511027789.0A CN201511027789A CN105403484B CN 105403484 B CN105403484 B CN 105403484B CN 201511027789 A CN201511027789 A CN 201511027789A CN 105403484 B CN105403484 B CN 105403484B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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Abstract
The invention discloses a kind of powder fluidity and the measuring device and measuring method of compressibility, the measuring device of powder fluidity of the invention and compressibility includes transparent cabinet, support plate, motor, rectangular box, graduated cylinder, motor II, cursor and thin wall circular；The support plate and motor are installed in transparent cabinet, and the right end of the rectangular box and the right end of support plate are hinged, and the left end of rectangular box is connected by rope I with motor, are equipped with agitating device in rectangular box, right side wall is equipped with pressure sensor I in rectangular box；Motor II is connected by cursor with thin wall circular；The right end that the graduated cylinder corresponds to rectangular box is located in supporting table, pressure sensor II is equipped between graduated cylinder and supporting table, the lateral wall of graduated cylinder is equipped with microseism device, and motor, motor II, pressure sensor I, microseism device and pressure sensor II are connected with console respectively.The configuration of the present invention is simple, can measure characterization powder fluidity parameter and compressibility parameter at different temperatures.
Description
Technical field
The invention belongs to powder measurement field, more particularly to the measuring device of a kind of powder fluidity and compressibility and
Measuring method.
Background technology
Increasing material manufacturing is commonly called as 3D printing manufacturing technology, this technology is quickly changing the traditional mode of production of people
And life style, the 3D printing manufacturing technology with the characteristics of digitlization, networking, personalization, customization think to push away by the external world
The dynamic third time industrial revolution.It is the widest with the 3D printing of Selective Laser Sintering (SLS) in 3D printing technique method
It is general.This technology completes the conveying of powder with paving, then passes through laser one by powdering mechanism and powder feeding mechanism and roller
It is sintered layer by layer, finally obtains required printed matter Products, and certain temperature is all to maintain in whole process.In this process
In, whether powder, which can be paved to have with powder fluidity, directly contacts, and mobility is better, and the quality of powdering is also higher,
The precision of the product quality of printing is also much higher.
Mobility is to weigh the fine or not important indicator of powdering quality.At present, the parameter for weighing powder fluidity mainly has
Angle of repose, outflow, size distribution etc..In addition to mobility characterizes, the compressibility of powder is also an important measurement
Index, compressibility are usually characterized with the ratio between powder bulk density and loosening bulk density, i.e. the Hausner ratios HR of powder
Come, i.e.,
The device of existing measurement powder flowing is all certain single parameter of measurement powder under room temperature, and is spread in 3D printing
During powder, consider the mobility of powder and compressibility is that raising for powdering quality has very big influence；At the same time
Temperature is also essential influence factor during powdering.
However, existing public technology data or document do not consider the relevant characterization characteristic of powder mostly, also no pair
Device is answered to measure the mobility of powder and compressibility, does not also account for shadow of the temperature to powder fluidity and compressibility
Ring, the mobility and compressibility of powder under different temperatures are more measured without related device.
The content of the invention
In order to solve the above technical problem, the present invention provides a kind of powder flowing simple in structure, easy to operate, cost is low
The measuring device and measuring method of property and compressibility.
The technical solution that patent of the present invention uses is：A kind of measuring device of powder fluidity and compressibility, including it is saturating
Camera-lucida body, support plate, motor, rectangular box, graduated cylinder, motor II, cursor and thin wall circular；The support plate and motor installation
In transparent cabinet, the right end of the rectangular box and the right end of support plate are hinged, and the left end of rectangular box passes through rope I and motor
Connection, rectangular box is interior to be equipped with agitating device, and right side wall is equipped with pressure sensor I in rectangular box；The motor II is installed on
On transparent cabinet, motor II is connected by cursor with thin wall circular；The right end that the graduated cylinder corresponds to rectangular box is located at branch
Support on platform, pressure sensor II is equipped between graduated cylinder and supporting table, graduated cylinder upper end is concordant with the bottom of thin wall circular, outside graduated cylinder
Side wall is equipped with microseism device, and supporting table is located at transparent cabinet bottom, motor, motor II, pressure sensor I, microseism device and pressure
Sensor II is connected with console respectively.
In above-mentioned powder fluidity and the measuring device of compressibility, support with a scale is equipped with transparent cabinet vertically
Frame, supporting rack with a scale are equipped with scale, and scale is connected with rope II, and rope II connects around runner II with the runner I on motor
Connect, the upper end of rope I is connected on the runner I on motor.
Be equipped with above-mentioned powder fluidity and the measuring device of compressibility, in the transparent cabinet heating unit,
Temperature sensor I and inert gas installation, are equipped with temperature sensor II in the rectangular box, the lower section of rectangular box in support plate
Equipped with electric heater, heating unit, temperature sensor I, temperature sensor II, inert gas installation and electric heater are respectively with
Control platform connection.
In above-mentioned powder fluidity and the measuring device of compressibility, the graduated cylinder and supporting table are placed in recovery tank
It is interior.
The measuring method of a kind of powder fluidity and compressibility, comprises the following steps that：
(1) powder is added in rectangular box, the pressure sensor I on right side wall in rectangular box is covered, starts heating
Device, after the temperature in babinet is reached assigned temperature, stops heating；Start inert gas installation, while start electric heater
And agitating device, when powder temperature reaches assigned temperature, start motor, rope I and rope II are synchronized with the movement, a left side for rectangular box
End rises, and pressure sensor I is subject to keep falling the pressure of powder, feeds back console, motor stop motion, passes through tape measure
Go out the lifting height H of rectangular box left end；
(2) right end of rectangular box is opened by console, powder is flowed into graduated cylinder, after powder exceeds thin wall circular, in
Platform control motor reversal is controlled, powder stops flow into, and starts motor II, cursor drives thin wall circular rotation, while also strikes off
The powder of graduated cylinder port, after thin wall circular is separated with graduated cylinder, motor II is out of service, reads pressure sensor II and feeds back to middle control
The data M of platformPine；Then, motor II is controlled to invert by console, when thin wall circular returns to graduated cylinder port position, motor II stops
Only；Motor is controlled to rotate forward, powder is flowed into graduated cylinder from rectangular box again, after powder exceeds thin wall circular, controls motor reversal；
Start micro- device that shakes, the powder in graduated cylinder is begun to decline, and micro- device that shakes stops after vibrating ten minutes, starts motor II and rotates forward, cursor
Thin wall circular rotation is driven, has struck off the powder of graduated cylinder port again, after thin wall circular is separated with graduated cylinder, motor II stops fortune
OK, the data M that pressure sensor II feeds back to console is readTightly。
(3) surveyed after data, passed through formulaWithCalculate angle of repose α and HR value.
Compared with prior art, the beneficial effects of the invention are as follows：
The configuration of the present invention is simple, cost are low, easy to operate；The present invention can measure at different temperatures powder fluidity and
The characterization parameter of compressibility, experiment base is established for research of the temperature to powdering effect in research selective laser sintering process
Plinth.
Brief description of the drawings
Fig. 1 be the present invention powder fluidity and compressibility measuring device structure diagram.
In figure, 1- axis, 2- motors, 3- runners I, 4- rectangular box, 5- agitating devices, 6- temperature sensors I, 7- pressure sensings
Device I, 8- thin wall circulars, 9- heating units, 10- inert gas installations, 11- cursors, 12- motors II, 13- motor fixing frames,
14- recovery tanks, 15- supporting tables, 16- microseism devices, 17- pressure sensors II, 18- graduated cylinders, 19- supporting racks, 20- hinges, 21- electricity
Heater, 22- auxiliary blocks, 23- supporting racks with a scale, 24-- support plates, 25- temperature sensors II, 26- scales, 27- ropes I,
28- ropes II, 29- runners II, 30- transparent cabinets.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention includes graduated cylinder 18, transparent cabinet 30, heating unit 9, inert gas installation 10, support plate
24th, rectangular box 4, sliding block 11, micro- device 16 that shakes, thin wall circular 8, rope I 27, motor 2, rope II 28, motor II 12, runner I 3,
Runner II 29 and scale 26.The heating unit 9, inert gas installation 10, support plate 24, motor 2, motor II 12 are installed on
In transparent cabinet 30；In order to measure the temperature in transparent cabinet 30, temperature sensor I 6 is additionally provided with transparent cabinet 30.
Support plate 24 is horizontally disposed, and the rectangular box 4 is arranged in support plate 24, and the right end of rectangular box 4 passes through hinge
20 are hinged with the right end of support plate 24.4 madial wall of rectangular box is equipped with temperature sensor II 25, and right side wall is equipped with pressure sensing
Device I 7.The lower section of rectangular box 4 is equipped with electric heater 21 and auxiliary block 22 in support plate 24.The rope I 27 is curled up in runner I 3
On, runner I 3 is driven by motor 2.Described I 27 one end of rope is fixed on the left end of rectangular box 4.The rope II 28, which curls up, to be turned
Take turns I 3, on runner II 29, runner I 3 is driven by motor 2, runner II 29 moves, so as to drive rope II 28 to move.Rope II 28
One end is connected with scale 26, and scale 26 is located on supporting rack 23 with a scale, can be slided on supporting rack 23 with a scale, with a scale
Supporting rack 23 is located in transparent cabinet 30 vertically.The rope I 27, rope II 28 are driven by motor 2 and drawn, and realize synchronous fortune
It is dynamic, so that scale 26 accurately measures the inclined height of rectangular glass box rising.The right end that graduated cylinder 18 corresponds to rectangular box 4 is set
In supporting table 15, pressure sensor II 17 is equipped between graduated cylinder 18 and supporting table 15, micro- device that shakes is housed on 18 lateral wall of graduated cylinder
16；Graduated cylinder 18 and supporting table 15 are arranged in recovery tank 14.
Motor II 12 is supported by motor fixing frame 13, and motor II 12 is connected by cursor 11 with thin wall circular 8；Cursor
11 can rotate in the horizontal plane；The lower end of thin wall circular 8 is concordant with the upper end of graduated cylinder 18.The motor 2, motor II 12,
It is pressure sensor I 7, pressure sensor II 17, temperature sensor I 6, temperature sensor II 25, microseism device 16, heating unit 9, lazy
Property gas device 10 and electric heater 21 are connected with console respectively.
The powder fluidity of the present invention and the measuring method of compressibility, include the following steps：
(1) experimental provision is prepared to just continuous, opening glass box body 31, powder, covering rectangle are added in rectangular box 4
Pressure sensor I 7 in box 4 on right side wall, shuts chamber door, starts heating unit 9, the temperature in babinet is reached specified
After temperature, stoppage in transit heating unit 9, starts inert gas installation 10, while starts heater 21 and agitating device 5, makes rectangular box 4
Middle powder homogeneous heating, after powder temperature reaches assigned temperature in rectangular box 4, starts motor 2, rope I 27, rope II 28 leads to
Runner I 3, runner II 29 are crossed, realization is synchronized with the movement, and 4 left end of rectangular box rises, and pressure sensor I 7 is subject to the powder that keeps falling
Pressure, feeds back console, 2 stop motion of motor, the height H that 4 left end of tape measure rectangular box rises at this time.
(2) after the height for having measured the rising of 4 left end of rectangular box, the right end of rectangular box 4 is opened by console, powder flows into
In graduated cylinder 18, after powder exceeds thin wall circular 8, console control motor 2 inverts, and powder stops flow into, and starts motor II 12,
Cursor 11 drives thin wall circular 8 to rotate, while has struck off the powder of 18 port of graduated cylinder, after thin wall circular 8 is separated with graduated cylinder 18,
Motor II 12 is out of service, reads the data M that pressure sensor II 17 feeds back to consolePine；Then, electricity is controlled by console
Machine II 12 inverts, and when thin wall circular 8 returns to 18 port position of graduated cylinder, motor II 12 stops, and controls motor 2 to rotate forward at this time, powder
Flowed into again from rectangular box 4 in graduated cylinder 18, after the powder in graduated cylinder 18 exceeds thin wall circular 8, control motor 2 inverts, powder
Stop flow into, the micro- device 16 that shakes of startup, the powder in graduated cylinder 18 declines, and micro- device 16 that shakes, which vibrates ten minutes, to be stopped, and starts motor II 12
Rotate forward, cursor 11 drives the rotation of 8 ring of thin-wall circular, has struck off the powder of 18 port of graduated cylinder, thin wall circular 8 is separated with graduated cylinder 18
Afterwards, motor II 12 is out of service, reads the data M that pressure sensor II 17 feeds back to console at this timeTightly。
(3) surveyed after data, passed through formulaWithCalculate angle of repose α and HR value.
According to above step, different temperature is set, you can measure the mobility and compressibility of powder under different temperatures
Characterization parameter.
Claims (2)
1. the measuring device of a kind of powder fluidity and compressibility, it is characterized in that：Including transparent cabinet, support plate, motor, square
Shape box, graduated cylinder, motor II, cursor and thin wall circular；The support plate and motor are installed in transparent cabinet, the square
The right end of shape box and the right end of support plate are hinged, and the left end of rectangular box is connected by rope I with motor, and stirring is equipped with rectangular box
Device, right side wall is equipped with pressure sensor I in rectangular box；The motor II is installed on transparent cabinet, and motor II passes through
Cursor is connected with thin wall circular；The right end that the graduated cylinder corresponds to rectangular box is located in supporting table, graduated cylinder and supporting table it
Between be equipped with pressure sensor II, graduated cylinder upper end is concordant with the bottom of thin wall circular, and the lateral wall of graduated cylinder is equipped with microseism device, support
Platform is located at transparent cabinet bottom, and motor, motor II, pressure sensor I, microseism device and pressure sensor II connect with console respectively
Connect；Supporting rack with a scale is equipped with the transparent cabinet vertically, supporting rack with a scale is equipped with scale, and scale connects with rope II
Connect, rope II is connected around runner II with the runner I on motor, and the upper end of rope I is connected on the runner I on motor；It is described
Transparent cabinet in be equipped with heating unit, temperature sensor I and inert gas installation, the rectangular box is interior to be equipped with temperature sensing
Device II, the lower section of rectangular box is equipped with electric heater, heating unit, temperature sensor I, temperature sensor II, inertia in support plate
Gas device and electric heater are connected with console respectively；The graduated cylinder and supporting table is placed in recovery tank.
2. the measuring method of a kind of powder fluidity and compressibility, comprises the following steps that：
（1）Powder is added in rectangular box, the pressure sensor I on right side wall in rectangular box is covered, starts heating unit,
After the temperature in babinet is reached assigned temperature, stop heating；Start inert gas installation, while start electric heater and stirring
Device, when powder temperature reaches assigned temperature, starts motor, rope I and rope II are synchronized with the movement, on the left end of rectangular box
Rise, pressure sensor I is subject to keep falling the pressure of powder, feeds back console, motor stop motion, goes out square by tape measure
The lifting height H of shape box left end；
（2）The right end of rectangular box is opened by console, powder is flowed into graduated cylinder, after powder exceeds thin wall circular, console
Motor reversal is controlled, powder stops flow into, and starts motor II, cursor drives thin wall circular rotation, while has also struck off graduated cylinder
The powder of port, after thin wall circular is separated with graduated cylinder, motor II is out of service, reads pressure sensor II and feeds back to console
Data；Then, motor II is controlled to invert by console, when thin wall circular returns to graduated cylinder port position, motor II stops；
Motor is controlled to rotate forward, powder is flowed into graduated cylinder from rectangular box again, after powder exceeds thin wall circular, controls motor reversal；Open
Micro- device that shakes is moved, the powder in graduated cylinder is begun to decline, and micro- device that shakes stops after vibrating ten minutes, starts motor II and rotates forward, cursor band
Dynamic thin wall circular rotation, has struck off the powder of graduated cylinder port again, and after thin wall circular is separated with graduated cylinder, motor II is out of service,
Read the data that pressure sensor II feeds back to console；
（3）Survey after data, passed through formulaWithCalculate angle of repose α and HR value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027789.0A CN105403484B (en) | 2015-12-31 | 2015-12-31 | The measuring device and measuring method of a kind of powder fluidity and compressibility |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511027789.0A CN105403484B (en) | 2015-12-31 | 2015-12-31 | The measuring device and measuring method of a kind of powder fluidity and compressibility |
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| CN105403484A CN105403484A (en) | 2016-03-16 |
| CN105403484B true CN105403484B (en) | 2018-04-13 |
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| CN105842117A (en) * | 2016-05-23 | 2016-08-10 | 华东理工大学 | Device and method for measuring powder fluidity |
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| RU2727319C1 (en) * | 2019-10-03 | 2020-07-21 | Российская Федерация, от имени которой выступает Государственная корпорация по атомной энергии "Росатом" (Госкорпорация "Росатом") | Device for measuring fluidity of powder material |
| CN111398093B (en) * | 2020-04-21 | 2023-02-10 | 中国科学院宁波材料技术与工程研究所 | Detection equipment with powder fluidity characterization device |
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