CN105345019A - Efficient arc discharge preparation method for metal powder used for 3D printing - Google Patents
Efficient arc discharge preparation method for metal powder used for 3D printing Download PDFInfo
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- CN105345019A CN105345019A CN201510844321.4A CN201510844321A CN105345019A CN 105345019 A CN105345019 A CN 105345019A CN 201510844321 A CN201510844321 A CN 201510844321A CN 105345019 A CN105345019 A CN 105345019A
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- running roller
- roller wheel
- main roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/14—Making metallic powder or suspensions thereof using physical processes using electric discharge
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Abstract
The invention discloses an enhanced double-tube laryngeal mask. The enhanced double-tube laryngeal mask comprises a mask body, a hard shaping tube, a bendable ventilating tube, a draining tube, a ventilating tube and an inflatable air pocket, wherein one end of the ventilating tube is connected to the bendable ventilating tube, and the other end of the ventilating tube passes through the hard shaping tube to be connected with the mask body; the inflatable air pocket is connected with the mask body; the draining tube passes through the hard shaping ventilating tube and the mask body. According to the enhanced double-tube laryngeal mask, the placement mode of the laryngeal mask is changed, and more important is that a stomach tube can be placed during use, so that surgical operation can be conveniently carried out. The enhanced double-tube laryngeal mask can overcome various defects of a traditional laryngeal mask, and is safe, efficient, and easy to operate.
Description
Technical field
The invention belongs to mechanized equipment and automatic field, relate to a kind of 3D printing metal dust efficient electric arc discharge preparation facilities.
Background technology
It is the popular domain of current research that 3D printing, laser melting coating etc. increase material manufacturing technology.The traditional of ratio subtracts material manufacturing technology, and restriction increases material manufacture process and relates to a large amount of solid metal materials, for the printing shaping of part or the cladding finishing of metallic matrix.
The high temperature melt metal that spark plasma electric discharge produces or conductive material, can be used to prepare metal dust.Such as document discloses the method (Yu Jun etc. utilizing spark plasma to carry out superalloy powder to prepare, high temperature alloy fine powder new technology [J] is prepared in spark plasma electric discharge. Acta Metallurgica Sinica .44 (7), 2008:892-896), one, spark discharge due to discharge energy low, electrode spacing is little, as easy as rolling off a logly causes short circuit, causes powder to be easy to ablation, its two, preparation efficiency is its Main Bottleneck, and the method is discharged based on spark plasma, and spark plasma electric discharge low the becoming of working (machining) efficiency know together in the industry, in addition, also have document to disclose and use electric spark to carry out powder preparation (Guo Shuanquan, Deng. powder technology [J] is prepared in spark plasma electric discharge, material Leader .24 (10), 2010:112-116), its shortcoming as above, namely preparation efficiency is low, although the document and two sections of document (the 1. Ackermann quoted thereof, etal.Fabricationofcryogenicrefrigeratorregeneratormateri alsbysparkerosion:US, 5133800 [P] .1992-07-28, 2. CarreyJ, RadouskyHB, BerkowitzAE.Spark-erodedparticles:Influenceofprocessingp arameters [J] .JApplPhys, 2004, 95 (3): 823) method adopting electrode rotary motion is disclosed, but based on spark discharge, utilize electrode rotary motion to improve chip removal effect and can not improve preparation efficiency in essence, and electrode adopts immersion to arrange, be unfavorable for the heat radiation of liquid state or gaseous metal cooling and working media, be unfavorable for refinement powder, and this process cannot utilize fluid to the effect of the in vitro electric discharges such as spark, be unfavorable for the ablation preventing particle.
The spark plasma of ratio, arc-plasma has high-energy current density, high-energy-density, such as utilize arc discharge to metal material processing, its working (machining) efficiency is than efficiency height 1-2 order of magnitude of traditional spark electric discharge processing, prior art is being prepared in refining metallic powder, a large amount of employing arc-discharge technique, means are typically utilized to have two kinds, one is the high-temperature heating heating of metal utilizing arc discharge to produce, make it to become metallic vapour, and various by cooling means make metal dust lower the temperature after form refining metallic powder, plasma generator used relates generally to plasma arc furnace etc., disclosed by patent document CN201010164462.9, its two be directly utilize arc-plasma to produce high temperature action on the metal material, metal material passes through electric current as electrode, melt after producing arc discharge, vaporized electrode material, gaseous state or liquid metals material is made to form refining metallic powder by the various method of cooling again, the preparation method of 3D printing micro-sized spherical titanium powder disclosed in patent document CN201510159503.8, the method utilizes reguline metal titanium workpiece, the particle of the particle diameter 30-80nm produced by arc discharge, the arc discharge environment that the document discloses is inert gas, the effect of inert gas is used to be that protection metal dust is from oxidation, and for example a kind of nano particle preparation system of patent document CN201320649362.4 disclosure, this system is also utilize arc discharge to discharge under gaseous environment, prepare refining metallic powder, this patent utilization high-voltage arc generating means produces arc discharge, arc generator is arranged two electrodes for generation of electric arc, two electrodes are oppositely arranged, be positioned in same level, and keep end not contact.
Except gas phase arc discharge is prepared except refining metallic powder, also the report utilizing liquid phase arc discharge to prepare refining metallic powder is had, disclosed in patent document CN02141780.6, liquid phase arc system is for the method for ultra-fine grain and monodimension nanometer material, preparation means disclosed by the method is the electrode utilizing reactor and be embedded on reactor, and add reaction liquid by reactor, make the submergence of electrode leading portion in a liquid and the distance adjusting electrode piece is 1-10mm, after power supply energising, produce refining metallic powder based on arc discharge.The method reaction liquid used is liquid nitrogen, liquid helium or high purity water, and the time that arc discharge continues is 30 minutes.Method described in this patent document be utilization be immersed in electrode discharge in reactant liquor realize particle preparation, its shortcoming has: 1) by electrode submergence continuous discharge 30 minutes in the reaction, reactant liquor temperature rise must be caused serious, strengthen cooling recirculation system work and meet, be unfavorable for controlling energy consumption; 2) gas temperature such as liquid nitrogen, liquid helium is low, and electrode places operating difficulties, and high purity water is under arc discharge produces ionic discharge effect, and electrical conductivity rises obviously, need increase ion exchange system.3) utilize the mode of electrode submergence, lack effective short circuit precautionary measures, and due to export license cause continuous production difficulty.
In a word, prior art utilizes spark plasma or arc-plasma to prepare metal dust, and Problems existing is summarized as follows, one, preparation efficiency, on the one hand, spark plasma is utilized to prepare powder, because its ability is little, preparation efficiency inadequate natural endowment, on the other hand, arc plasma is utilized to prepare, although can produce high temperature, but in discharge process, the liquid metal of melting, the gaseous metal of evaporation and cooled solid granulates very easily cause short circuit in-between the electrodes, thus affect preparation efficiency; Two, current interruption mechanism, due to the high-energy-density of the plasmas such as electric arc, lasting electric discharge very easily causes the ablation of particle to damage, if without adequately and reasonably current interruption is machine-processed, then can affect particle preparation quality; Three, particulate removal between electrode, adopts common block type electrode submergence electric discharge or other preparation method without auxiliary chip removal campaign, and spillage of material uneven causing is difficult to continuity preparation on the one hand, and another aspect is easy does not freely cause short circuit due to particulate removal; Four, discharge medium is protected, and particularly to immersion electric discharge, the medium containing metal dust causes interpolar discharge characteristic changing.
Summary of the invention
For the above-mentioned problem that need solve, the invention provides a kind of 3D printing metal dust efficient electric arc discharge preparation facilities.
The technical scheme that technical solution problem of the present invention is taked is as follows:
A kind of 3D prints with metal dust efficient electric arc discharge preparation facilities, comprise liquid-supplying system, drainage system, air supply system, discharge power supply, it is characterized in that: also comprise supporting base, main roller wheel, main roller wheel brush, nozzle, baffle plate, from running roller, from running roller brush, collect filter, from running roller movement guide mechanism, nozzle movement guiding mechanism, main roller wheel power set and from running roller power set;
Described main roller wheel is installed on supporting base and rotates around its axis under main roller wheel power set drive; Described to connect from running roller movement guide mechanism from running roller, moving linearly in X direction under it drives, and rotating around its axis under driving from running roller power set from running roller;
Described main roller wheel and be provided with nozzle above the gap between running roller, nozzle moves horizontally in X direction under nozzle movement guiding mechanism drives, the arrival end of this nozzle is connected with air supply system with described liquid-supplying system respectively, and the port of export sprays the fluid-mixing medium with pressure towards main roller wheel with from the gap between running roller;
Described main roller wheel connects the positive pole of discharge power supply by main roller wheel brush, described passes through from running roller the negative pole connecting discharge power supply from running roller brush, make discharge power supply puncture main roller wheel and from the gap between running roller, form arc-plasma between gap and melt main roller wheel and from running roller material; The fluid-mixing medium cooling of this material through nozzle ejection forms refining metallic powder, and this refining metallic powder by suppressing to splash in main roller wheel and the baffle plate that arranges around running roller, and flows into the collection filter that baffle plate lower ending opening place arranges;
Liquid medium in described collection filter delivers to liquid-supplying system by drainage system, realizes periodic duty.
Further, described main roller wheel and contrary from running roller direction of rotation.
Further, the position at described nozzle place adjusts according to main roller wheel with from the interstitial site between running roller in good time.
Further, described main roller wheel and be conductive material from running roller.
Further, described liquid-supplying system provides the liquid medium of adjustable parameter, air supply system to provide the inert gas of Parameter adjustable.
Compared with prior art, beneficial effect of the present invention is:
1) particle preparation efficiency, by pressure fluid media impingement discharging gap, the metal dust in timely and effective eliminating gap, prevents short circuit, improves preparation efficiency;
2) utilize pressure fluid medium disturbance even breaking arc, utilize interelectrode relative motion to realize mechanical arc, utilize the electric current interruption of discharge power supply control realization, effectively control electric arc to the action time of particle, protection particle is subject to excessive ablation;
3) adopt the roller electrode rotated, particle is prepared in auxiliary eliminating, and homogenizing export license;
4) non-immersion electric discharge is adopted, protective medium flash-over characteristic.
Accompanying drawing explanation
Fig. 1 is 3D printing metal dust efficient electric arc discharge preparation facilities X-Z direction of the present invention schematic diagram;
Fig. 2 is 3D printing metal dust efficient electric arc discharge preparation facilities X-Y direction of the present invention schematic diagram;
In figure: 1 liquid-supplying system, 2 supporting bases, 3 main roller wheel, 4 main roller wheel brushes, 5 nozzles, 6 baffle plates 7 are from running roller, 8 from running roller brush, and 9 collect filter, 10 drainage systems, 11 from running roller movement guide mechanism, 12 discharge power supplies, 13 nozzle movement guiding mechanisms, 14 air supply systems, 15 main roller wheel power set, 16 from running roller power set.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
Refer to Fig. 1 and Fig. 2, Fig. 1 is 3D printing metal dust efficient electric arc discharge preparation facilities X-Z direction of the present invention schematic diagram; Fig. 2 is 3D printing metal dust efficient electric arc discharge preparation facilities X-Y direction of the present invention schematic diagram.As shown in the figure, a kind of 3D prints with metal dust efficient electric arc discharge preparation facilities, comprises liquid-supplying system 1, drainage system 10, air supply system 14, discharge power supply 12, supporting base 2, main roller wheel 3, main roller wheel brush 4, nozzle 5, baffle plate 6, from running roller 7, from running roller brush 8, collects filter 9, from running roller movement guide mechanism 11, nozzle movement guiding mechanism 13, main roller wheel power set 15 and from running roller power set 16.
Main roller wheel 3 is installed on supporting base 2 and can rotates around its axis under main roller wheel power set 15 drive; Connect from running roller movement guide mechanism 11 from running roller 7, can move along a straight line in X direction under it drives, and can rotate around its axis under driving from running roller power set 16 from running roller 7.Main roller wheel 3 and be provided with nozzle 5 above the gap between running roller 7; nozzle 5 can move horizontally in X direction under nozzle movement guiding mechanism 13 drives; and spray the fluid-mixing medium with pressure by liquid-supplying system 1 and air supply system 14; this fluid media (medium) provides discharge medium on the one hand; timely breaking arc on the other hand, the particle prepared by protection is from arc erosion and oxidation.Main roller wheel 3 and the positive and negative electrode being connected discharge power supply 12 from running roller 7 respectively by main roller wheel brush 4 with from running roller brush 8; Discharge power supply 12 punctures main roller wheel 3 and from the gap between running roller 7, and the arc-plasma of formation melts main roller wheel 3 and from running roller 7 material; The liquid medium cooling that the material melted is sprayed by nozzle 5 forms refining metallic powder, and this particle suppresses to splash by baffle plate 6, and collects by collecting filter 9.The liquid medium collected in filter 9 delivers to liquid-supplying system 1 by drainage system 10, realizes periodic duty.
Main roller wheel 3 and contrary from running roller 7 direction of rotation.
The position at nozzle 5 place adjusts according to main roller wheel 3 with from the interstitial site between running roller 7 in good time.
Main roller wheel 3 and be conductive material from running roller 7.
Liquid-supplying system 1 provides the liquid medium of adjustable parameter, and air supply system 14 provides the inert gas of Parameter adjustable.
Described discharge power supply 12 realizes electric current interruption for the pulse power.
Main roller wheel is cylindrical, then can add its rotary motion, and improve preparation efficiency, main roller wheel also can be square, then himself cannot rotate, and rotates by from running roller.
The principle of the invention is as follows:
Main roller wheel 3 rotates under main roller wheel power set 15 drive, and rotates under driving from running roller power set 16 from running roller 7, main roller wheel 3 and contrary from the direction of rotation of running roller 7, and both keep certain gap, and this gap is discharging gap;
Main roller wheel 3 and connect the two poles of the earth of discharge power supply 12 from running roller 7 respectively by brush, now forms electric field in main roller wheel 3 with from the gap of running roller 7; Nozzle 5 is connected to liquid-supplying system 1 and air supply system 14, and both fluid-mixing medium is sprayed on main roller wheel 3 and from the gap before running roller 7.
When running roller movement guide mechanism 11 drive to move from running roller 7 to main roller wheel 3 near time, main roller wheel 3 and the gap from running roller 7 constantly diminish until puncture, and form arc-plasma; Main roller wheel 3 and melt instantaneously from the material of region of discharge running roller 7, evaporate, under the effect of fluid-mixing medium, cooling forms particle rapidly, fluid-mixing medium can disturbance arc plasma, coordinate electric current interruption, in conjunction with main roller wheel 3 with from the mechanical current interruption between running roller 7, protection particle is ablated, prevents oxidized under the gas shield of air supply system 1 simultaneously; Particle suppresses to splash by baffle plate 6 under fluid-mixing medium washes away, and enters collection filter 9, and particle is separated with liquid medium by filter 9, and the liquid medium after separation is drawn into liquid-supplying system 1 Posterior circle by drainage system 10 and uses.In addition, the fluid-mixing medium liquid towards that nozzle 5 sprays or gaseous metal apply external force, refinement powder in its cooling condensation process.
Claims (6)
1. a 3D prints with metal dust efficient electric arc discharge preparation facilities, comprise liquid-supplying system (1), drainage system (10), air supply system (14), discharge power supply (12), it is characterized in that: also comprise supporting base (2), main roller wheel (3), main roller wheel brush (4), nozzle (5), baffle plate (6), from running roller (7), from running roller brush (8), collect filter (9), from running roller movement guide mechanism (11), nozzle movement guiding mechanism (13), main roller wheel power set (15) and from running roller power set (16),
Described main roller wheel (3) is installed on supporting base (2) and rotates around its axis under main roller wheel power set (15) drive; Described to connect from running roller movement guide mechanism (11) from running roller (7), moving linearly in X direction under it drives, and rotating around its axis under driving from running roller power set (16) from running roller (7);
Described main roller wheel (3) and be provided with nozzle (5) above the gap between running roller (7), nozzle (5) moves horizontally in X direction under nozzle movement guiding mechanism (13) drives, the arrival end of this nozzle (5) is connected with air supply system (14) with described liquid-supplying system (1) respectively, and the port of export sprays the fluid-mixing medium with pressure towards main roller wheel (3) with from the gap between running roller (7);
Described main roller wheel (3) connects the positive pole of discharge power supply (12) by main roller wheel brush (4), described passes through from running roller (7) negative pole connecting discharge power supply (12) from running roller brush (8), make discharge power supply (12) puncture main roller wheel (3) and from the gap between running roller (7), form arc-plasma between gap and melt main roller wheel (3) and from running roller (7) material; The fluid-mixing medium cooling that this material through nozzle (5) sprays forms refining metallic powder, this refining metallic powder by suppressing to splash at the baffle plate (6) of main roller wheel (3) and setting around running roller (7), and flows into the collection filter (9) of baffle plate (6) lower ending opening place setting;
Liquid medium in described collection filter (9) delivers to liquid-supplying system (1) by drainage system (10), realizes periodic duty.
2. 3D printing metal dust efficient electric arc discharge preparation facilities according to claim 1, it is characterized in that: described main roller wheel (3) and contrary from the direction of rotation of running roller (7), realize mechanical movement current interruption, main roller wheel (3) and adjusting according to clearance discharge condition from the distance between running roller (7); The position at described nozzle (5) place adjusts according to main roller wheel (3) with from the interstitial site between running roller (7) in good time.
3. 3D printing metal dust efficient electric arc discharge preparation facilities according to claim 1, is characterized in that: described main roller wheel (3) and be conductive metallic material from running roller (7).
4. 3D printing metal dust efficient electric arc discharge preparation facilities according to claim 1, it is characterized in that: described liquid-supplying system (1) provides the liquid medium of adjustable parameter, described air supply system (14) provides the inert gas of Parameter adjustable.
5. 3D printing metal dust efficient electric arc discharge preparation facilities according to claim 1, is characterized in that: described discharge power supply (12) is the pulse power.
6. 3D printing metal dust efficient electric arc discharge preparation facilities according to claim 1, is characterized in that: described is cylindricality metal material from running roller (7), and described main roller wheel (3) is cylindricality or reguline metal material.
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| CN201510844321.4A CN105345019B (en) | 2015-11-26 | 2015-11-26 | The 3D printing efficient arc discharge preparation facilities of metal dust |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105522154A (en) * | 2016-03-03 | 2016-04-27 | 中研智能装备有限公司 | Plasma 3D (three-dimensional) fast forming equipment and method for rollers |
| CN107584133A (en) * | 2017-08-18 | 2018-01-16 | 江苏天泽教育咨询有限公司 | A kind of 3D printing powder preparing unit |
| WO2021088217A1 (en) * | 2019-11-07 | 2021-05-14 | 深圳航科新材料有限公司 | New spherical powder and preparation method therefor |
| WO2021088218A1 (en) * | 2019-11-07 | 2021-05-14 | 深圳航科新材料有限公司 | New method for green recovery and reprocessing of metal to produce spherical composite powder |
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| WO2021088217A1 (en) * | 2019-11-07 | 2021-05-14 | 深圳航科新材料有限公司 | New spherical powder and preparation method therefor |
| WO2021088218A1 (en) * | 2019-11-07 | 2021-05-14 | 深圳航科新材料有限公司 | New method for green recovery and reprocessing of metal to produce spherical composite powder |
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