CN106378454B - A kind of pulse on-off valve type metal 3D printing device - Google Patents
A kind of pulse on-off valve type metal 3D printing device Download PDFInfo
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- CN106378454B CN106378454B CN201610888070.4A CN201610888070A CN106378454B CN 106378454 B CN106378454 B CN 106378454B CN 201610888070 A CN201610888070 A CN 201610888070A CN 106378454 B CN106378454 B CN 106378454B
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/115—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by spraying molten metal, i.e. spray sintering, spray casting
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/31—Calibration of process steps or apparatus settings, e.g. before or during manufacturing
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
-
- 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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/30—Process control
- B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/10—Auxiliary heating means
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/22—Driving means
- B22F12/226—Driving means for rotary motion
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/30—Platforms or substrates
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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
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/90—Means for process control, e.g. cameras or sensors
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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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y50/00—Data acquisition or data processing for additive manufacturing
- B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
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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
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/22—Direct deposition of molten metal
-
- 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
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Analytical Chemistry (AREA)
Abstract
The invention discloses a kind of pulse on-off valve type metal 3D printing device, it can be achieved that accurate jet deposition 3D printing forming of the molten metal under the control of pulse on-off valve.In more detail, the present invention is characterized in that, by the purification for melting and filtering realization molten metal, realize that the controllable precise of molten metal continuously sprays by the pulsed on-off of pivoting leaf flaky valve at control printing head, by the movement of three-dimensional coordinate platform courses spray head, printing substrate is supplied to the stable temperature of forming platform, and final design goes out metal rapid melting can be achieved, multistage purification, the inexpensive increasing material manufacturing equipment of controllable precise jet deposition.
Description
Technical field
Present invention is mainly applied to the material increasing fields of metal material, and it is logical in pulse to be related to a kind of achievable molten metal
Accurate jet deposition formation device under disconnected valve control.In more detail, it is a feature of the present invention that passing through multistage fusing and more
The purification of molten metal is realized in grade filtering, and the controllable precise of molten metal is realized by the pulsed on-off of valve at control printing head
Injection.
Background technique
3D printing technique comes across in the 1980s, it is a kind of method manufacture entity zero gradually to be added up using material
The technology of part is removed relative to traditional material --- and Machining Technology for Cutting is the manufacturing method of a kind of " from bottom to top ".The skill
Art does not need traditional cutter and fixture and multi-step process, can produce to fast precise on one device any multiple
The part of miscellaneous shape solves the forming of many parts with complex structures to realize part " freely manufacturing ", and greatly reduces
Manufacturing procedure, shortens the process-cycle.And product structure is more complicated, and the effect of manufacturing speed is more significant.Mai Kenxi
It predicts 2025, entire increasing material manufacturing application market is up to the amount of money of 4,600,000,000,000 U.S. dollars.In equipment end, Smarttech
The year two thousand twenty is predicted, relevant device, material and the scale of service market are estimated to reach 11,300,000,000 U.S. dollars, and printing device will be in future
10 years by occupy 50% staple market.In face of huge demand, lot of domestic and international enterprise, colleges and universities and scientific research institutions are to photocuring
Rapid shaping (SLA), stacking entity system (LOM), laser/electron beam melt powder/line molding (SLS/SLM/EBM), three dimensional printing at
The forming methods such as type (3DP), fused glass pellet (FDM) are furtherd investigate, and develop a plurality of increasing material manufacturing equipment.It is existing
There are still formed precision, shaping speeds to be difficult to the problem of taking into account in forming method and equipment, in addition, picture
Although can preferably realize the controllable three-dimensionally shaped of metal material in the methods of SLS/SLM/EBM, laser and
Electron beam equipment relevant cost is higher, directly affects the universal and industrialization of the technology.
3D printing method is deposited based on metal jet deposition technique and the metal jet of 3D printing method, directly by continuous
The mode of air pressure push sprays molten metal by nozzle, and constantly deposits in forming platform, passes through the forming gold that successively adds up
Belong to part, it can be achieved that metalwork efficient, inexpensive, direct printing-forming.But when jet deposition speed is higher, due to metal
Fluid viscosity is lower, and spouting velocity and deposition accuracy are difficult to control.And traditional equipment is relatively simple for structure, and function is relatively single,
It cannot achieve the functions such as melt impurity and purification.In the present invention, multistage fusing and Multistage filtering device are designed, realizes the net of molten metal
Change；Using the rotating vane of special shape, the pulse on-off of valve type is realized, to control the accurate injection of molten metal.Finally, it grinds
Produce metal rapid melting, multistage purification, the inexpensive increasing material manufacturing equipment of controllable precise jet deposition.
Summary of the invention
The purpose of the present invention is develop a can be achieved based on existing metal jet deposition 3D printing forming technique
Metal rapid melting, multistage purification, the inexpensive increasing material manufacturing equipment of controllable precise jet deposition.
To achieve the above object, The technical solution adopted by the invention is as follows:
A kind of pulse on-off valve type metal 3D printing device, composition includes: to provide vacuum environment for Models of Spray Deposition
Partially, the spray head of shape is precisely controlled to for realization metal, the two-step purification part for being realization molten metal refining, provide stably depositing
The printing substrate part of environment, three-axis moving to realize molten metal orientated deposition platform, to realize entire fusion sediment mistake
The part of measurement and control that journey steady ordered carries out.
In the present invention, can be used the equipment realize jet deposition material ranges it is wider, theoretically from thermoplastic, to
Printing can be achieved in aluminium alloy, magnesium alloy, kirsite or even high temperature alloy etc., so for being also easy to produce the more living of oxide inclusion
Metal is sprinkled, needs to provide vacuum environment or inert gas shielding in print procedure.According to alloy melting principle, vacuum or indifferent gas
Body environment also contributes in melt being mingled with the precipitation with micro-bubble, facilitates metal purification.In this equipment, it is true the limit can be extracted into
Reciprocal of duty cycle is 10Pa, and the time used is 20min.
Further, vacuum system includes device housings, vacuum valve, vacuum pipe and two-stage vacuum pump.Vacuum system
After self-starting, Automatic Control is may be implemented in whole operational process.Vacuum needed for setting is not achieved after First vacuum pump startup
When second vacuum pump startup to the vacuum values for reaching setting.First vacuum pump stops then the after reaching required setting value
Two vacuum pumps stop cycle operation.
In the present invention, the spray head to realize that metal is precisely controlled to shape includes spray head heating part, stepper motor, rotating wheel
And nozzle, spray head part are the cores of the device.Stepper motor rotates under pulse electrical signal effect, and special rotating wheel is driven to transport
It is dynamic, it realizes and the switch control of melt canal is acted on.The method can be realized by changing the parameter of pulse signal to metal bath
The accurate control of dropping velocity shapes to generate stable liquid stream in substrate deposition.Which realizes " metal bath valve "
Function, and spray head is in heating environment, it is not easy to it blocks.
In the present invention, to realize that the two-step purification part of molten metal refining includes two melting kettles, solid metallic fusing
Device uses induction heating, and which has the advantages that heating power is big, heating speed is fast, homogeneous heating is, it can be achieved that a variety of gold
Belong to it is quick heating (if material itself not magnetic, copper band can be increased, by copper band heat production and be conducted to metal material).Solid
, it can be achieved that blanking, adds refining agent, stirring, the function of skimming in state metal molten device, to improve melting efficiency, promoted
Smelting metal liquid quality.Fluent metal thermal insulation melting appartus mainly uses resistance heating, due to upper level outflow metal temperature compared with
Height, heating system main function are solid for heat insulation.The power of induction heating system is 10kw, and the power of resistive heating system is
1kw。
Further, in melting appartus at different levels distinguish mounting temperature sensor, can real-time monitoring melt temperature variation, and
Heating powers at different levels are adjusted according to demand.
Further, for temperature in 1300 degree of metal baths below, selection is at low cost, stability is good, inoxidizability is strong
K-type (nickel network-nisiloy) thermocouple temperature measurement, and Real-time Feedback analog quantity temperature signal.
In the present invention, the printing substrate part for providing stably depositing environment has a significant impact to forming accuracy.Printing substrate
Including adding thermal resistance, cooling water recirculation system, temperature sensor.The real-time monitoring of forming platform temperature in the course of work can be achieved
And adjusting, phenomena such as so that the course of work is maintained at proper temperature, avoid solidification caused by inter-laminar stress uneven.
In the present invention, triaxial movement platform selects the positioning and directing for the molten metal realized to fall, and spray head is fixed on the three-dimensional
On telecontrol equipment, by computer drawing 3-D graphic, 3 D motion trace code is layered and generated by Slice Software, thus
Printing accumulation layer by layer is realized in movement.
In the present invention, measurement and control section need three kinds of temperature collection, pressure, image signals altogether, control induction heating, electricity
Hinder the links such as heating, substrate heating, stepper motor, bath surface air pressure, three-dimensional platform movement.By to melting appartus at different levels,
Spray head, printing substrate temperature, bath surface pressure, the real-time monitoring of droplet photos issue control command after analytical judgment, make temperature
The parameters such as degree and air pressure meet printing demand.
Further, bath surface stable gas pressure is realized by air pressure controlling system, it includes gas cylinder, decompression venting valve, two
The original parts such as position-3-way solenoid valve are computed the mathematics of determining flow velocity and the surface pressure in second level molten bath after simulation and test amendment
Relationship acquires pressure signal in real time, controls the open and-shut mode of each valve body.
Further, picture collection device can real-time monitoring acquire molten drop picture, analyzed through data, can be obtained molten drop size and
The parameters such as flow velocity after being computed analysis, can be used as feed back input control system, further instruct and correct other in print procedure
Link.
Further, measurement and control section include temperature, pressure sensor, digital quantity/analog input and output module, work
Industry controls computer etc..In print procedure, the temperature signal of real-time monitoring everywhere, the pressure signal above melt, acquisition is simultaneously
It is sent to computer, after Data Analysis Services, issues corresponding digital signal, the works such as control solenoid valve, motor heating coil
Make the state of unit.
The utility model has the advantages that
1. in the present invention, designing new type nozzle, principle is that the effect of metal bath valve is realized by the rotation of rotating wheel, surely
Determine drop flow velocity, greatly improves printing precision.
2. controlling melt by the on-off of " pulse valve " in the pressure and spray head in control junior's melting appartus in invention
Jet velocity obtains corresponding pressure, corresponding motor revolving speed and deposition print speed after theoretical calculating simulation and experiment amendment
Mathematical relationship, and then can realize print procedure accurate control, it can be achieved that quickly, the jet deposition formation of degree of precision.
3. in the present invention, alloy melting, injection, deposition process are carried out under vacuum or inert gas environment, according to not
Same alloy melting and forming requirements, can control the normality pressure in printing environment.Vacuum or atmosphere of inert gases not only may be used
To realize the purification of alloy melt, and it can guarantee that molten metal is not oxidized in print procedure.
4. in the present invention, vacuum system includes two-stage vacuum pump, and vacuum can realize automation control, then input institute
After needing pressure, the work of first order vacuum pump startup, after reaching certain pressure, two-stage vacuum pump is worked together, and improves pumping speed
Rate is, it can be achieved that higher vacuum level requirements.
5. fast blanking can be achieved in the present invention and skim, molten metal stirring can be achieved in upper level purification, next stage is net
There is strainer to may filter that the impurity such as metal oxide in change.
6. including two-stage melting appartus in the present invention, and every grade of melting appartus uses different principle of heating, according to fusing
Or the demand of heat preservation adjusts heating power, that is, saves the energy, and can accurately realize the requirement of printing, guarantees printing metal temperature
Stablize.
7. using image collecting device real-time image acquisition data in the present invention, and analyze in time, forms control command and repair
The parameters such as positive air pressure and stepper motor revolving speed form closure control, promote printing precision.
8. links have corresponding measurement sensor cooperating in the present invention, real-time monitoring parameters simultaneously upload phase
Answer data, by measurement and control unit, and then can realize and vacuumize, heat, fusion sediment printing (comprising three-axis platform move) etc. rings
The automatic control of section.
Detailed description of the invention
A kind of pulse on-off valve type metal 3D printing schematic diagram of device of Fig. 1.
A kind of pulse on-off valve type metal 3D printing device shower head principle figure of Fig. 2.
Pulse valve schematic diagram in Fig. 3 spray head.
Fig. 4 pneumatic control system schematic diagram.
Fig. 5 control and acquisition system schematic diagram.
Specific embodiment
In order to which the objects, technical solutions and advantages of the invention patent are more clearly understood, below in conjunction with attached drawing and implementation
Example, is described in more detail the invention patent.
Embodiment one:
A kind of pulse on-off valve type metal 3D printing device, composition includes: to provide vacuum environment for Models of Spray Deposition
Pumped vacuum systems, for realize metal accurately control injection forming spray head (7), for realize molten metal refining Multistage purifying disguise
It sets, printing substrate (4) that stably depositing forming environment is provided, the triaxial movement platform to realize molten metal orientated deposition, be real
The part of measurement and control that now entire fusion sediment process steady ordered carries out.
Embodiment two:
Before jet deposition 3D printing starts, it is put into solid metallic level-one melting appartus (14) by the way that metal material will be printed,
Two-stage vacuum pumps (1) work, opens vacuum valve (2), the printing system wrapped up by vacuum pipe (3) whole equipment shell (19)
System vacuumizes, and after reaching certain vacuum degree, begins to use the induction heating apparatus (13) of connection solid metallic melting appartus (15)
Refining agent is added in metal material, and stirring rod (18) movement driven by fixed ring (17) makes refining agent diffusion uniformly, and generates
Slag.Processing of skimming is carried out after alloy is completely melt, standing stablizes alloying component for a period of time, forms uniform level-one gold
Belong to melt (16).The metal bath (9) in next stage melting appartus is opened, this grade of smelting apparatus has through bolt (25) even
The pressure cover (12) connect makes inside that can keep setting gas pressure, is heated up by resistive heating device (8), reach pre- to temperature
If value, pours into second level melting appartus (10) for molten metal in upper level melting appartus, is filtered by strainer (11), closed after the completion
It closes pressure cover (12), pressure cover is connect by bolt (25) with the melting appartus for filling metal bath (9).When molten metal stands one section
Between, equilibrium temperature and ingredient.Temperature sensor (20,26) acquires the temperature of two-stage purification device in real time, analyzes and determines that sending adds
Heat stops heating signal.
Embodiment three:
Bath surface stable gas pressure is realized by air pressure controlling system (22), acquires number pressure by pressure sensor (23)
According to being uploaded to industrial personal computer and collect and analyze.Air pressure is adjusted by connection pressure pipeline (21), is stablized by decompression venting valve (32)
The flowing velocity of gas when air pressure is higher than setting value, opens solenoid valve (33) connection exhaust pipe (34), to system deflation, reduces
Pressure；When air pressure is lower than setting value, solenoid valve (33) connection gas cylinder (35) is opened, system is inflated, increases pressure.
Example IV:
Heating and cooling water recirculation system (5) in open printing substrate (4) acquire temperature by temperature sensor (27) in real time
Signal is spent, the temperature by controlling printing substrate (4) after temperature regulation system (24) analysis and processing data reaches preset value.
Embodiment five:
Pressure is stable and after reaching setting value, passes through triaxial movement platform (28) and drives spray head movement.Metal bath is in gas
It is flowed freely into nozzle (31) under pressure and gravity, stepper motor (29) rotates under pulse electrical signal effect, drives special rotation
Runner (30) movement is realized and is acted on the switch control of melt canal.When rotating wheel (30) goes to special angle, metal is filled
The melting appartus of melt (9) is connected with nozzle (31), molten metal outflow；Rotating wheel (30) continues to move, and channel is closed；Work as rotation
Runner (30) rotates to next cycle, and " on-off " situation can stablize appearance.
Embodiment six:
High-speed camera (6) real-time monitoring acquires molten drop picture, through image pick-up card by data transmission such as industrial personal computer, passes through
Image analysis obtains molten drop size and flow parameters, after further calculating analysis, as feed back input control system.
Embodiment seven:
This equipment is needed through sensor real-time monitoring temperature, pressure, image data, and is uploaded to Industry Control meter in time
Corresponding program in calculation machine, controls each heating module heating power after discriminatory analysis, the three-dimensional path of motion module, air pressure module
Pressure controlling, the revolving speed etc. of stepper motor.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of pulse on-off valve type metal 3D printing device, characterized by comprising: pumped vacuum systems, spray head (7), Multistage purifying
Makeup set, air pressure controlling system (22), printing substrate (4), triaxial movement platform (28), image capturing system；Pumped vacuum systems
It is made of device housings (19), two-stage vacuum pump (1), vacuum valve (2) and its vacuum pipe (3), by vacuum pump (1) to forming
Environment is vacuumized, and oxidation of the metal bath in print procedure is reduced；Stage purifying device includes level-one melting appartus
(14) and its subsidiary induction heating apparatus (13), second level melting appartus (10) and metal bath (9)；Level-one melting appartus
(14) solid metallic melting appartus (15) heating fast using heating speed, and the device is open, it can be achieved that blanking, addition essence
Refine agent, stirring, the function of skimming, to realize cleaning molten；Second level melting appartus (10) uses resistive heating device (8), rises
The solid effect of heat insulation, and filter screen (11) are fixed in the device, it may filter that bulky grain oxide impurity in melt, thus
Realize the purification of metal bath (9)；Acquire the temperature of two-stage melting appartus in real time by temperature sensor (20,26), analysis is sentenced
Break and issues heating or stop heating signal；Air pressure controlling system (22) is connected by pressure cover (12) and second level melting appartus (10)
It connects, rotation can be achieved in pressure cover (12) under the fixation of bolt (25), facilitates supplement molten metal；Printing substrate (4) is by being arranged in
Its internal adding thermal resistance and cooling water recirculation system (5), temperature sensor (27) composition, by cooling water recirculation system and add
Stable substrate temperature control is realized in the cooperation of hot systems；Triaxial movement platform (28) is arranged in below substrate, passes through connector
Realization is moved synchronously with substrate；Image capturing system high speed video camera (6) is arranged in spray head side, and status requirement can shoot molten
Wherein, the spray head (7) includes stepper motor (29), rotating wheel (30) and nozzle (31) to bodily form looks；Metal bath (9) is in air pressure
With flowed freely under gravity nozzle (31), stepper motor (29) rotates under pulse electrical signal effect, and drives rotating wheel
(30) it moves, realizes and the switch control of melt canal is acted on；Rotating wheel (30) is linked by swingle and stepper motor (29),
Linkage can be achieved；Rotating wheel (30) side is provided with through-hole, when through-hole is connected with second level melting appartus (10) infusion channel, melts
Body flows through infusion channel and through-hole under air pressure and gravity, and is sprayed by nozzle (31) end, rotating wheel (30) rotation one
After determining angle, infusion channel is blocked, and melt stops injection；Nozzle (31) aperture can be plurality of specifications, to adapt to different
Metal material and print speed requirement.
2. a kind of pulse on-off valve type metal 3D printing device according to claim 1, which is characterized in that bath surface gas
Pressure realizes that it includes gas cylinder (35), decompression venting valve (32), solenoid valve (33) original part, through counting by air pressure controlling system (22)
It calculates simulation and tests the mathematical relationship of determining flow velocity and second level melting appartus (10) air pressure inside after amendment, acquire pressure in real time and believe
Number, the open and-shut mode of each valve body is controlled, when air pressure is higher than setting value, opens solenoid valve (33) connection exhaust pipe (34), it is right
System deflation reduces pressure；When air pressure is lower than setting value, solenoid valve (33) connection gas cylinder (35) is opened, system is inflated, is increased
Big pressure.
3. a kind of pulse on-off valve type metal 3D printing device according to claim 1, which is characterized in that high-speed camera
(6) can real-time monitoring acquisition injection and deposition molten drop pattern, analyzed through data, molten drop size and flow parameters can be obtained, pass through
After calculating analysis, feed back input control system can be used as, further instruct and correct other links in print procedure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888070.4A CN106378454B (en) | 2016-10-12 | 2016-10-12 | A kind of pulse on-off valve type metal 3D printing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888070.4A CN106378454B (en) | 2016-10-12 | 2016-10-12 | A kind of pulse on-off valve type metal 3D printing device |
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| Publication Number | Publication Date |
|---|---|
| CN106378454A CN106378454A (en) | 2017-02-08 |
| CN106378454B true CN106378454B (en) | 2019-11-05 |
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| CN201610888070.4A Active CN106378454B (en) | 2016-10-12 | 2016-10-12 | A kind of pulse on-off valve type metal 3D printing device |
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