CN109482375A - It is a kind of for sieving the device and method thereof of metal powder - Google Patents
It is a kind of for sieving the device and method thereof of metal powder Download PDFInfo
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- CN109482375A CN109482375A CN201811644354.4A CN201811644354A CN109482375A CN 109482375 A CN109482375 A CN 109482375A CN 201811644354 A CN201811644354 A CN 201811644354A CN 109482375 A CN109482375 A CN 109482375A
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- metal powder
- sieving
- grading plant
- powder
- feeding device
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C9/00—Combinations with other devices, e.g. fans, expansion chambers, diffusors, water locks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/50—Cleaning
- B07B1/55—Cleaning with fluid jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/16—Sorting according to weight
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- Combined Means For Separation Of Solids (AREA)
Abstract
A kind of equipment for sieving metal powder, including sequentially connected feeding device, screen(ing) machine, feed hopper, it is classified feeding device, grading plant, Cyclonic separating apparatus, filter and air-introduced machine, setting ultrasonic activation sieves and bounder vibrating screen inside the screen(ing) machine, and the ultrasonic activation sieve is located above the bounder vibrating screen, coarse powder collecting tank is connected below the grading plant, fines collection tank is connected below the Cyclonic separating apparatus, superfine powder collecting tank is connected below the filter, the feeding device, the screen(ing) machine, the classification feeding device, the grading plant carries out control with control system with the air-introduced machine and connects.Metal powder is sieved by the equipment, the accurate screening of metal powder is realized, the granularity requirements of different metal 3D printing technique can be met.
Description
Technical field
The present invention, which relates to, belongs to powder metallurgical technology, is carried out precisely more particularly, to a kind of pair of 3D printing with metal powder
The device and method thereof of screening.
Background technique
Powder metallurgy be using metal powder (or mixture of metal powder and non-metal powder) as raw material, by
Shape and sintering, the technology of manufacture metal material, composite material and various types product.Powder metallurgy includes powder processed and system
Product, wherein powder processed is mainly metallurgical process.In metallurgical process, even with same material powder when, in order to meet
Technical need, powder have had to suitable size distribution.The purpose of screening is the different raw material powder of particle size by grain
Degree is divided into the narrower several grades of magnitude range, reaches suitable size distribution for adjustment ingredient and creates conditions.
Metal 3D printing technique as an emerging technology in powder metallurgy, granularity and its distribution to metal powder,
The characteristic requirements such as pattern, apparent density, mobility and oxygen content are very high.In terms of powder size, it is required that it is narrow as far as possible, it is average
Granularity is also required to control in reasonable size, to guarantee the stability of powder conveying and the microstructure and property of final products.But
In actual production, traditional powder sieving process is usually relatively complex, and is readily incorporated impurity and is polluted environment；In addition, powder
Screening precision is difficult to control, causes its more difficult metal 3D printing technique that meets to require, screening efficiency is lower, and to a certain extent
Cause the waste of material.
Therefore, it for disadvantages described above, needs effectively to innovate the prior art.
Summary of the invention
The purpose of the present invention is to provide a kind of for sieving the device and method thereof of metal powder, by the equipment to gold
Belong to powder to be sieved, realizes the accurate screening to metal powder, the granularity of different metal 3D printing technique can be met
It is required that.
For above-mentioned purpose, the present invention adopts the following technical scheme:
A kind of equipment for sieving metal powder, including sequentially connected feeding device, screen(ing) machine, feed hopper, be classified into
Expect device, grading plant, Cyclonic separating apparatus, filter and air-introduced machine, inside the screen(ing) machine setting ultrasonic activation sieve and
Bounder vibrating screen, and ultrasonic activation sieve is located above the bounder vibrating screen, connects below Yu Suoshu grading plant
Coarse powder collecting tank is connect, fines collection tank is connected below Yu Suoshu Cyclonic separating apparatus, connection is ultra-fine below Yu Suoshu filter
Powder collecting tank, the feeding device, the screen(ing) machine, the classification feeding device, the grading plant and the air-introduced machine are the same as control
System processed carries out control connection, controls feeding device by control system and is classified the charging rate of feeding device, controls screen(ing) machine
Switch, adjust ultrasonic activation sieve and bounder vibrating screen vibration frequency, adjust grading plant and air-introduced machine frequency, and
Control the opening and closing of air-introduced machine；
Under the regulation of control system, metal powder is transported to screen(ing) machine from feeding device, is shaken by the ultrasonic wave on screen(ing) machine
Dynamic sieve screens out metal powder relatively crude in metal powder and thin metal powder with bounder vibrating screen respectively；For thick
Metal powder, ultrasonic activation sieve can efficiently separate large or fine granule in metal powder, reduce fine grained by coarse granule band
The ratio walked improves screening efficiency, and for thin metal powder, the high amplitude of bounder vibrating screen can reduce sieve by metal
The probability that powder particle is blocked, that improves powder crosses net rate；The metal powder that bounder Vibration Screen separates enters feed hopper, gold
Belong to powder in the case where being classified regulation of the feeding device to its conveying speed, continues transported in grading plant, pass through grading plant pair
Fine metal powder sieves again, and relatively crude metal powder enters coarse powder collecting tank, remaining metal powder enters cyclone type separation dress
It sets and is sieved again, the metal powder for meeting collection condition enters fines collection tank, remaining goes successively to filter, passes through filtering
Remaining metal powder is filled into superfine powder collecting tank by device, and exhaust gas is discharged into air from air-introduced machine；
Correspondingly, the feeding device includes electric and magnetic oscillation feeding device, by the vibration for controlling electric and magnetic oscillation feeding device
Dynamic frequency controls charging rate and inlet amount；
Correspondingly, being correspondingly arranged collecting tank with ultrasonic activation sieve, sieved from ultrasonic activation sieve for collecting
Thick metal powder out；
Correspondingly, the classification feeding device includes spiral rod type charger, metal is controlled using screw charger
The conveying speed of powder fundamentally avoids caused by the conversion between process in connecting spiral rod type charger on screen(ing) machine
Powder pollution, improves the degree of purity of powder；
Correspondingly, air inlet is arranged on the grading plant, air-introduced machine by grading plant, Cyclonic separating apparatus and
After air-flow extraction in pulse filter, external air-flow is introduced in grading plant by air inlet, so that air-introduced machine can be held
Continuous property the air-flow in grading plant, Cyclonic separating apparatus and pulse filter is aspirated, metal powder is realized with this
The multiple screening at end；
Correspondingly, being respectively provided with pneumatic operated valve, the gas on the coarse powder collecting tank, fines collection tank and superfine powder collecting tank
The dynamic external control system of valve, the opening and closing of pneumatic operated valve is controlled by control system, to control the folding of corresponding collecting tank；
Correspondingly, gas pulses device is arranged in the filter, the strainer in filter is sprayed by gas pulses device
Pulse gas, to be cleaned to strainer.
Based on the screening plant of above-mentioned metal powder, a kind of method for sieving of metal powder is obtained, is included the following steps:
1) it passes sequentially through ultrasonic activation sieve and bounder vibrating screen tentatively sieves metal powder, ultrasonic activation
The crude metal powder screened out enters collecting tank, and the fine metal powder that bounder Vibration Screen separates is transported to feed hopper；
2) metal powder in feed hopper is transported to grading plant by classification feeding device with certain speed；
3) metal powder for meeting grading plant screening condition, enters coarse powder collecting tank by grading plant, remaining metal
Powder continues transported to cyclone under the suction force effect of air-introduced machine；
4) metal powder for meeting Cyclonic separating apparatus screening condition, enters fines collection by Cyclonic separating apparatus
Tank, remaining metal powder continue transported to filter under the suction force effect of air-introduced machine；
5) metal powder is collected by filtration in the filter into superfine powder collecting tank；
Correspondingly, metal powder is transported in ultrasonic activation sieve by feeding device in step 1)；
Correspondingly, grading plant sieves metal powder by the weight of metal powder, and weight is greater than in step 3)
Or the metal powder equal to grading plant setting weight, coarse powder collecting tank is entered under the downward thrust of grading plant, weight is small
Cyclonic separating apparatus is transported under the action of induced draft blower withdraws power in the metal powder of setting numerical value；
Correspondingly, Cyclonic separating apparatus sieves metal powder by the weight of metal powder in step 4), weight
Amount is greater than or equal to the metal powder of Cyclonic separating apparatus setting weight, and fine powder is entered under the action of Cyclonic separating apparatus
Collecting tank, the metal powder that weight is less than setting numerical value are transported to filter under the action of induced draft blower withdraws power.
The invention has the benefit that
1) side that ultrasonic vibrating screen, bounder vibrating screen and airflow screening (air-flow that induced draft blower withdraws are formed) combine
Method precisely sieves metal powder, improves screening efficiency, and the granularity that can meet different metal 3D printing technique is wanted
It asks；
2) combination settings of screen(ing) machine and spiral rod type charger fundamentally avoid powder caused by the conversion between process
End pollution, improves the degree of purity of powder；
3) screening process is regulated and controled by control system, effectively shortens workflow, improve screening efficiency.
Detailed description of the invention
Fig. 1 is described in one embodiment of the invention for sieving the device structure schematic diagram of metal powder；
Fig. 2 and Fig. 3 is the metal screened out using the equipment described in one embodiment of the invention for sieving metal powder
Powder size testing result；
In figure:
1, electric and magnetic oscillation feeding device；2, screen(ing) machine；21, ultrasonic activation sieves；22, bounder vibrating screen；3, feed hopper；4,
Spiral rod type charger；5, grading plant；6, coarse powder collecting tank；7, Cyclonic separating apparatus；8, fines collection tank；9, pulse
Filter；10, superfine powder collecting tank；11, air-introduced machine.
Specific embodiment
As shown in Figure 1, in one embodiment of the invention, the equipment for sieving metal powder, including be sequentially connected
Feeding device, screen(ing) machine 2, feed hopper 3, classification feeding device, grading plant 5, Cyclonic separating apparatus 7, filter and air inducing
Machine 11, in the present embodiment, feeding device be arranged electric and magnetic oscillation feeding device 1, classification feeding device be set as spiral rod type into
Material machine 4, filter are set as pulse filter 9, and hose is used between electric and magnetic oscillation feeding device 1, screen(ing) machine 2 and feed hopper 3
Connection is connected between grading plant 5, Cyclonic separating apparatus 7 and pulse filter 9 using hard tube.Ultrasound is set inside screen(ing) machine 2
Wave vibrating screen 21 and bounder vibrating screen 22, and ultrasonic activation sieve 21 is located at 22 top of bounder vibrating screen, in grading plant 5
Upper setting air inlet connects coarse powder collecting tank 6 below grading plant 5, connects fines collection below Cyclonic separating apparatus 7
Tank 8 connects superfine powder collecting tank 10, electric and magnetic oscillation feeding device 1, screen(ing) machine 2, spiral rod type charging below pulse filter 9
Machine 4, grading plant 5 and air-introduced machine 11 carry out control with control system and connect, and control electric and magnetic oscillation charging dress by control system
The charging rate of 1 and spiral rod type charger 4 is set, the switch of screen(ing) machine 2 is controlled, adjusts ultrasonic activation sieve 21 and bounder vibration
The vibration frequency of sieve 22, adjusts the frequency of grading plant 5 and air-introduced machine 11, and controls the opening and closing of air-introduced machine 11.
Device structure described in an embodiment according to the present invention, obtains metal powder described in one embodiment of the invention
Method for sieving, method include the following steps:
1) by the charging rate and inlet amount of regulation 1 vibration frequency control metal powder of electric and magnetic oscillation feeding device, and
Metal powder is transported in screen(ing) machine 2 by hose；
2) metal powder first passes through the sieve of the ultrasonic activation in screen(ing) machine 2 21, and the large or fine granule in separating metal powder is reduced
The ratio that fine grained is taken away by coarse granule, improves screening efficiency, and obtained crude metal powder is collected into collecting tank；
3) metal powder being sieving through through ultrasonic activation sieve 21 is sieved through bounder vibrating screen 22 again, bounder vibration
The high amplitude of dynamic sieve 22 can reduce the probability that sieve is blocked by metal powder granulates, and that improves powder crosses net rate, bounder vibration
The fine metal powder that dynamic sieve 22 screens out is transported to feed hopper 3；
4) metal powder in feed hopper 3 is transported to grading plant 5 by spiral rod type charger 4 with certain speed；
5) grading plant 5 sieves metal powder by the weight of metal powder, and weight is greater than or equal to classification dress
The metal powder for setting 5 setting weights, under the downward thrust of grading plant 5, into coarse powder collecting tank 6, weight is less than setting number
The metal powder of value is transported to Cyclonic separating apparatus 7 under the action of 11 suction force of air-introduced machine；
6) Cyclonic separating apparatus 7 sieves metal powder by the weight of metal powder, and weight is greater than or equal to
The metal powder of 7 setting weight of Cyclonic separating apparatus, under the active force of Cyclonic separating apparatus, into fines collection tank 8,
The metal powder that weight is less than setting numerical value is transported to pulse filter 9 under the action of 11 suction force of air-introduced machine；
7) metal powder is collected by filtration into superfine powder collecting tank 10 in pulse filter 9, and exhaust gas continues through air inducing
Machine 11 is discharged into the external world.
Using the equipment and method for sieving in the present embodiment, metal powder can be accurately classified, testing result
It is as follows:
1) sieve test is carried out to 316L powder of stainless steel.It is 150 mesh, bounder vibrating screen that ultrasonic activation, which sieves 21 mesh numbers,
22 mesh numbers are 270 mesh；4 frequency of spiral rod type charger is set as 10Hz, and 5 frequency of grading plant is 15Hz.Take 316L stainless steel logical
Powder 50kg, screening number be it is primary, when screening a length of 56min.Screening terminates, and the powder in coarse powder collecting tank 6 is taken to carry out granularity
Test, the powder accounting of 15~53 μm of particle size ranges reach 97%, meet wanting for selective laser melting (SLM) technical requirements
It asks, Fig. 2 is shown in granularity report.
2) 18Ni-300 mould steel powder classification is tested.It is 150 mesh, bounder vibrating screen 22 that ultrasonic activation, which sieves 21 mesh numbers,
Mesh number is 270 mesh；4 frequency of spiral rod type charger is set as 9Hz, and 5 frequency of grading plant is 12Hz.Take 18Ni-300 mould steel logical
Powder 50kg, screening number be it is primary, when screening a length of 52min.Screening terminates, and the powder in coarse powder collecting tank 6 is taken to carry out granularity
Test, the powder accounting of 15~53 μm of particle size ranges reach 95%, meet wanting for selective laser melting (SLM) technical requirements
It asks, Fig. 3 is shown in granularity report.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this narrating mode of specification is only that for clarity, those skilled in the art should incite somebody to action
As a whole, the technical solutions in the various embodiments may also be suitably combined for specification, and forming those skilled in the art can
With the other embodiments of understanding.
Claims (11)
1. a kind of equipment for sieving metal powder, including sequentially connected feeding device, screen(ing) machine, feed hopper, classification charging
Device, grading plant, Cyclonic separating apparatus, filter and air-introduced machine, it is characterised in that: ultrasonic wave is set inside the screen(ing) machine
Vibrating screen and bounder vibrating screen, and ultrasonic activation sieve is located above the bounder vibrating screen, fills in the classification
It sets lower section and connects coarse powder collecting tank, fines collection tank, Yu Suoshu filter lower section are connected below Yu Suoshu Cyclonic separating apparatus
It connects superfine powder collecting tank, the feeding device, the screen(ing) machine, the classification feeding device, the grading plant and described draws
Blower carries out control connection with control system.
2. a kind of equipment for sieving metal powder according to claim 1, it is characterised in that: the feeding device packet
Electric and magnetic oscillation feeding device is included, by the vibration frequency control charging rate and inlet amount that control electric and magnetic oscillation feeding device.
3. a kind of equipment for sieving metal powder according to claim 1, it is characterised in that: shake with the ultrasonic wave
Dynamic sieve is correspondingly arranged collecting tank.
4. a kind of equipment for sieving metal powder according to claim 1, it is characterised in that: the classification charging
Device includes spiral rod type charger, utilizes the conveying speed of screw charger control metal powder.
5. a kind of equipment for sieving metal powder according to claim 1, it is characterised in that: on the grading plant
Air inlet is set.
6. a kind of equipment for sieving metal powder according to claim 1, it is characterised in that: the coarse powder is collected
Pneumatic operated valve, the outer connected control system of the pneumatic operated valve are respectively provided on tank, fines collection tank and superfine powder collecting tank.
7. a kind of equipment for sieving metal powder according to claim 1, it is characterised in that: set in the filter
Set gas pulses device.
8. the method for sieving of -7 any a kind of metal powders according to claim 1, it is characterised in that: including walking as follows
Suddenly,
1) it passes sequentially through ultrasonic activation sieve and bounder vibrating screen tentatively sieves metal powder, ultrasonic activation sieve sieve
The crude metal powder separated enters collecting tank, and the fine metal powder that bounder Vibration Screen separates is transported to feed hopper；
2) metal powder in feed hopper is transported to grading plant by classification feeding device with certain speed；
3) metal powder for meeting grading plant screening condition, enters coarse powder collecting tank by grading plant, remaining metal powder
Cyclone is continued transported under the suction force effect of air-introduced machine；
4) metal powder for meeting Cyclonic separating apparatus screening condition, enters fines collection tank by Cyclonic separating apparatus,
Remaining metal powder continues transported to filter under the suction force effect of air-introduced machine；
5) metal powder is collected by filtration in the filter into superfine powder collecting tank.
9. a kind of method for sieving of metal powder according to claim 8, it is characterised in that: in step 1), pass through charging
Metal powder is transported in ultrasonic activation sieve by device.
10. a kind of method for sieving of metal powder according to claim 8, it is characterised in that: in step 3), grading plant
Metal powder is sieved by the weight of metal powder, weight is greater than or equal to the metal powder of grading plant setting weight
End, enters coarse powder collecting tank under the downward thrust of grading plant, and the metal powder that weight is less than setting numerical value is taken out in air-introduced machine
Cyclonic separating apparatus is transported under the action of suction.
11. a kind of method for sieving of metal powder according to claim 8, it is characterised in that: in step 4), cyclone type point
Metal powder is sieved by the weight of metal powder from device, weight is greater than or equal to Cyclonic separating apparatus setting weight
The metal powder of amount, enters fines collection tank under the action of Cyclonic separating apparatus, and weight is less than the metal powder of setting numerical value
End is transported to filter under the action of induced draft blower withdraws power.
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| CN201811644354.4A CN109482375A (en) | 2018-12-29 | 2018-12-29 | It is a kind of for sieving the device and method thereof of metal powder |
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| CN201811644354.4A CN109482375A (en) | 2018-12-29 | 2018-12-29 | It is a kind of for sieving the device and method thereof of metal powder |
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Cited By (6)
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| CN110293050A (en) * | 2019-06-26 | 2019-10-01 | 宁德师范学院 | A kind of lime stone thickness screening plant |
| CN110302962A (en) * | 2019-05-23 | 2019-10-08 | 中航迈特粉冶科技（北京）有限公司 | The screening system and method for sieving of active metal powder |
| CN111957579A (en) * | 2019-05-20 | 2020-11-20 | 米亚索乐装备集成（福建）有限公司 | Powder screening method and system |
| CN111979510A (en) * | 2020-08-17 | 2020-11-24 | 西安热工研究院有限公司 | Method for separating thermal barrier coating waste powder containing ceramic layer and bonding layer powder |
| TWI768741B (en) * | 2020-03-03 | 2022-06-21 | 日商Ｊｘ金屬股份有限公司 | Method for removing thread, device for removing thread, and method for removing scrap of electronic/electrical machine parts |
| CN115007461A (en) * | 2022-06-02 | 2022-09-06 | 江南大学 | Double-frequency ultrasonic powder dry classification system and method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111957579A (en) * | 2019-05-20 | 2020-11-20 | 米亚索乐装备集成（福建）有限公司 | Powder screening method and system |
| CN110302962A (en) * | 2019-05-23 | 2019-10-08 | 中航迈特粉冶科技（北京）有限公司 | The screening system and method for sieving of active metal powder |
| CN110302962B (en) * | 2019-05-23 | 2020-10-20 | 中航迈特粉冶科技（北京）有限公司 | Active metal powder screening system and screening method |
| CN110293050A (en) * | 2019-06-26 | 2019-10-01 | 宁德师范学院 | A kind of lime stone thickness screening plant |
| TWI768741B (en) * | 2020-03-03 | 2022-06-21 | 日商Ｊｘ金屬股份有限公司 | Method for removing thread, device for removing thread, and method for removing scrap of electronic/electrical machine parts |
| CN111979510A (en) * | 2020-08-17 | 2020-11-24 | 西安热工研究院有限公司 | Method for separating thermal barrier coating waste powder containing ceramic layer and bonding layer powder |
| CN115007461A (en) * | 2022-06-02 | 2022-09-06 | 江南大学 | Double-frequency ultrasonic powder dry classification system and method |
| CN115007461B (en) * | 2022-06-02 | 2023-05-02 | 江南大学 | Dual-frequency ultrasonic powder dry classification system and method |
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