CN202684090U - Metal drop spraying device - Google Patents
Metal drop spraying device Download PDFInfo
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- CN202684090U CN202684090U CN 201220241886 CN201220241886U CN202684090U CN 202684090 U CN202684090 U CN 202684090U CN 201220241886 CN201220241886 CN 201220241886 CN 201220241886 U CN201220241886 U CN 201220241886U CN 202684090 U CN202684090 U CN 202684090U
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Abstract
The utility model discloses a metal drop spray device and a method for spraying high-melting metal drops by using the metal drop spray device, so as to solve the technical problem that when the conventional metal drop spray device is used for spraying high-melting light active metal drops, the stability of the spray forming process is poor. The metal drop spray device maintains stable spray of the high-melting metal drops through an automatic spray nozzle dredging device and a spray condition detecting system. The spray nozzle dredging device for spraying high-melting metal and a metal drop spray condition monitoring feedback system are utilized. When the metal drop spray condition monitoring feedback system detects an unstable spray condition and sends out a cleaning signal, an excitation rod is lowered and then instant high positive pressure or negative pressure is introduced into an inner passage of the excitation rod, so that molten metal or air at a spray nozzle is enabled to flow at a high speed to bring out oxide skin or impurities attached to the inner wall of a spray orifice to achieve the purpose of cleaning and dredging the miniature spray nozzle, thus ensuring the stability of the high-melting metal drop spray forming process.
Description
Technical field
The utility model relates to a kind of metal drop injection apparatus, particularly relates to a kind of refractory metal molten drop injection apparatus.
Background technology
Utilize the controllable spray of molten drop to be expected to realize from the complicated zero/member of raw material metal Direct Rapid Prototyping Metal.Its basic functional principle is, utilize actuator at the inner pulse that produces a moment of melting kettle, make liquation pass through crucible bottom tiny nozzle ejection and form single metal drop, then this molten drop is deposited to exactly the predeterminated position on the moving substrate, according to certain deposition path, through piling up layer by layer, finally be shaped as complicated metal solid.
With reference to figure 2, document " Apparatus and method for generating droplets; Chandra Sanjeev; Jivraj Rahim.United States Patent:US 6446878; 2002 " discloses a kind of metal drop injection apparatus, and generation and the control of molten drop is described.The main body of this device is the crucible 7 that a smelting metal is used, and its outer having heaters 6, this heater 6 are heated controller 19 to control to keep the smelting temperature of crucible constant; Crucible bottom has aperture, bonding tiny nozzle 9 on it; A tube connector 27 is installed on crucible top, and tube connector connects a bleeder port 25 and gas cylinder 21 by T junction 26; Gas cylinder 21 inside are high-pressure inert gas 20, are connected with crucible 7 by pressure-regulating valve 22 and magnetic valve 24; The switch of magnetic valve 24 is by impulse generator 23 controls.
There is following deficiency in the disclosed device of document, the common metal injection apparatus is mainly used in the injection of low-melting point lead ashbury metal, chemical property torpescence and the density of terne metal are larger, this liquation is difficult for because of oxidation or corrodes the crucible inwall producing infusibility impurity, and the impurity such as a small amount of oxide skin can be because density swims in the liquation top layer less than liquation density, therefore nozzle is difficult for stopping up in the course of injection, and its inside does not have custom-designed nozzle cleaning dredger.If but use this to install when spraying such as high-melting-point lightweight reactive metal materials such as aluminium, magnesium, because the oxide skin that very easily produces in the metal molten process, and liquation and crucible internal-response can produce infusibility impurity, this type of impurity very easily adheres to, piles up at the spray orifice inwall, make spray regime become unstable, cause the deflection, generation satellite droplet even the plug nozzle that spray.
Summary of the invention
In order to overcome the deficiency of existing metal drop injection apparatus stage of spray forming process poor stability when spraying high-melting-point lightweight reactive metal molten drop, the utility model provides a kind of metal drop injection apparatus.This device has nozzle automatic dredging device and spray regime detection system, can keep the stable injection of molten drop.Utilize refractory metal to spray with nozzle dredger and metal drop spray regime monitoring reponse system, spray regime that can the Real-Time Monitoring injection apparatus and automatic the carrying out of Control Nozzle cleanup action.When wild effect appears in course of injection, molten drop spray regime monitoring feedback system measures is to the unstable injection state and send the cleaning signal, after reducing exciting rod, pass into large malleation or negative pressure of moment in the exciting rod inner passage, so that the molten metal at nozzle place or gas flow at high speed, thereby oxide skin or the impurity that will be attached on the spray orifice inwall are taken out of, with the purpose of the nozzle that realization is cleared up, dredging is small, thereby guarantee the stable of high droplet metal molten drop stage of spray forming process.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of metal drop injection apparatus, comprise heater 6, crucible 7, nozzle 9 and exciting rod 1, be characterized in also comprising sensor block 2, coldplate 4, solenoid 3, thermal insulation board 5, laser instrument 12, photoelectric sensor 13, Photoelectric Signal Processing unit 14, thermocouple 16, exciting driver 15, filter 17.Exciting rod 1 passes coldplate 4 and thermal insulation board 5 from top to bottom in the crucible 7, and crucible 7 is provided with a pressure entrance 18 near the place, top, and center, crucible 7 bottoms is nozzle 9, by nozzle 9 metal injection liquations 8.Heater 6 is equipped with in the outside of crucible 7, and crucible 7 bottom outside are installed thermocouple 16.Sensor block 2 places solenoid 3 inside, exciting driver 15 produces accumulation signal, drive electromagnetic induction coil 3, electromagnetic induction coil 3 produces a pulse magnetic and acts on sensor block 2, sensor block 2 drives exciting rod 1 downwards, exciting rod 1 is delivered to crucible 7 bottom nozzles 9 places with these mechanical oscillation, realizes the injection of minute metallic molten drop 10.Metal drop 10 after the injection is walked the light beam of laser generator 12, reflect beams of laser light, and photoelectric sensor 13 detects the variation of laser light signal, feeds back to Photoelectric Signal Processing unit 14.
The material of described crucible 7 is potteries.
The material of described crucible 7 is graphite.
The material of described sensor block 2 is paramagnets.
The beneficial effects of the utility model are: because this device has nozzle automatic dredging device and spray regime detection system, kept the stable injection of refractory metal molten drop.Utilize refractory metal to spray with nozzle dredger and metal drop spray regime monitoring reponse system, the carrying out of the spray regime of Real-Time Monitoring injection apparatus and automatic Control Nozzle cleanup action, when wild effect appears in course of injection, molten drop spray regime monitoring feedback system measures is to the unstable injection state and send the cleaning signal, after reducing exciting rod, pass into large malleation or negative pressure of moment in the exciting rod inner passage, so that the molten metal at nozzle place or gas flow at high speed, thereby oxide skin or the impurity that will be attached on the spray orifice inwall are taken out of, to realize cleaning, dredge the purpose of small nozzle, thereby guaranteed the stable of high droplet metal molten drop stage of spray forming process.
Below in conjunction with the specific embodiment the utility model is elaborated.
Description of drawings
Fig. 1 is the structural representation of the utility model metal drop injection apparatus.
Fig. 2 is the structural representation of background technology metal drop injection apparatus.
Among the figure, 1-exciting rod, 2-sensor block; the 3-solenoid, 4-coldplate, 5-thermal insulation board; the 6-heater, 7-crucible, 8-molten metal; the 9-nozzle, 10-metal drop, 11-protective gas; the 12-laser instrument, 13-photoelectric sensor, 14-Photoelectric Signal Processing unit; the 15-exciting driver, 16-thermocouple, 17-filter; the 18-pressure entrance, 19-heating controller, 20-Compressed Gas; the 21-gas cylinder, 22-pressure-regulating valve, 23-impulse generator; the 24-magnetic valve; the 25-bleeder port, 26-T shape joint, 27-tube connector.
The specific embodiment
With reference to Fig. 1, the utility model metal drop injection apparatus, comprise that heater 6, crucible 7, nozzle 9, sensor block 2, cooling block 4, exciting rod 1, solenoid 3, thermal insulation board 5, laser instrument 12, photoelectric sensor 13, Photoelectric Signal Processing unit 14, exciting driver 15, thermocouple 16, filter 17, exciting rod 1 pass coldplate 4 from top to bottom, crucible 7 walls are provided with a pressure entrance 18 near the place, top, crucible 7 bottoms centers is by the high-temperature agglomerant nozzle 9 that bonds, heater 6 is equipped with in the outside of crucible 7, and thermocouple 16 is installed in the crucible bottom outside.Crucible temperature passes to heating controller 19 after detecting by thermocouple 16, and heating controller 19 is according to detected temperatures control crucible temperature.Sensor block 2 places solenoid 3 inside, and the formation excitation system that matches with exciting rod 1; Exciting driver 15 produces the accumulation signal of certain amplitude and pulsewidth, drive electromagnetic induction coil 3, electromagnetic induction coil 3 produces a pulse magnetic and acts on sensor block 2, sensor block 2 drives exciting rod 1, exciting rod 1 is delivered to crucible bottom nozzle 9 places with these mechanical oscillation, realizes the injection of minute metallic molten drop 10.Molten drop after the injection is walked the light beam of laser generator 12, thereby reflect beams of laser light, photoelectric sensor 13 detects the variation of optical signal, feed back to Photoelectric Signal Processing unit 14, this element is through after judging processing, judge to spray normally whether, then control exciting driver 15 and carry out normal injection or dredging work.
Embodiment of the method 1: when carrying out refractory metal (such as stainless steel, copper, iron etc.) injection, crucible 7 adopts the ceramic material preparation, the inner filter 17 of installing is covered with the hole identical with the nozzle diameter size on it, be used for filtering out when metal liquid flows through oxide skin and large granular impurity; Thermocouple 16 is installed in the crucible bottom outside.Crucible temperature passes to heating controller 19 after detecting by thermocouple 16, is used for the control crucible temperature.
During the metal stock fusing, pass into protective gas 11, after its fusing, metal fluid is under the back pressure effect that top pressure entrance 18 provides, and the crucible that is pressed into filter 17 bottoms is inner, and is full of nozzle 9.
For the relatively high molten metal of density, can be before spraying, exciting rod 1 produces the larger concussion of amplitude in the place away from nozzle, makes less impurity and the oxide skin floating of density of crucible bottom, thereby reaches the effect of pre-cleaning.During injection, exciting driver 15 produces the pulse excitation signal of certain amplitude and pulsewidth, drive electromagnetic induction coil 3, electromagnetic induction coil 3 produces a pulse magnetic and acts on sensor block 2, sensor block 2 downwards operation drives exciting rod 1, these mechanical oscillation are delivered to crucible bottom nozzle 9 places, thereby at pulse of the inner generation of nozzle top adjacent fluid, to realize the injection of minute metallic molten drop 10.
Molten drop after the injection is walked the light beam of laser generator 12, so that photoelectric sensor 13 detects the variation of reflected light signal, thereby feeds back to Photoelectric Signal Processing unit 14.This element according to the signal of feedback judge to spray normally whether, control injection apparatus duty.In the metal jet process, mostly be because that the accumulation of nozzle place fine impurities causes spraying is crooked, when this situation occurs, respective change will occur in the laser beam of flight molten drop reflection, when Photoelectric Signal Processing unit 14 detects the photosignal different from normal injection, after contrasting with the experience situation, send a nozzle cleaning signal to exciting driver 15, the electromagnetic induction coil energising, thereby absorption sensor block 2 descends so that exciting rod 1 also descends thereupon, stops to nozzle 9 places when exciting driver reduces exciting rod 1.Connect the gas channels of exciting rod 1 inside, apply the moment malleation, the nozzle interior molten metal " is dodged spray " at a high speed go out, thereby take the impurity that is gathered in herein out of, reach the purpose of dredging nozzle.
Embodiment of the method 2: when carrying out the injection of active metal molten drop (such as magnesium, aluminium and alloy thereof etc.), crucible 7 adopts the graphite material preparation, inside is coated with anti-corrosion coating, be covered with the hole identical with the nozzle diameter size on the filter 17, be used for filtering out when metal liquid flows through residual oxide skin and large granular impurity; Thermocouple 16 is installed to detect crucible temperature and to pass to heating controller 19 in the crucible bottom outside, is used for control heater 6 heating crucibles.
Before metal stock is put into, adopt chemical method to remove its surperficial most of oxide skin, then rapidly metal stock is put into crucible 7 inside that pass into protective gas 11, after this connect protective gas 11, carry out heat fused; After the metal stock fusing, under the back pressure effect that top pressure entrance 18 provides, the crucible that is pressed into filter 17 bottoms is inner, and is full of nozzle 9.
Leave small gas channels in the middle of the exciting rod 1, be connected with sensor block 2 and pass coldplate 4 and thermal insulation board 5, its underpart and nozzle 9 approach.When sprayed the active metal, meeting be sprayed because of the oxidation of nozzle place liquation and be misfired usually, therefore at first need remove the oxide skin at nozzle 9 places.At this moment, electromagnetic induction coil 3 produces a constant magneticaction in sensor block 2, and sensor block 2 drives exciting rod 1 and descends, and stops to nozzle 9 places when exciting driver reduces exciting rod 1.Connect the gas channels of exciting rod 1 inside, moment applies large air pressure or negative pressure, with the nozzle interior molten metal " dodging spray " at a high speed and go out or to suck back, thereby take the oxide skin that is gathered in herein out of.
After this, exciting driver 15 produces conventional pulse excitation signal, drives electromagnetic induction coil 3, drives whole exciting rod 1 work to drive sensor block 2, thereby at pulse of the inner generation of nozzle top adjacent fluid, to realize the injection of minute metallic molten drop 10.
When the active metal molten drop after the injection was walked the light beam of laser generator 12, its reflect beams of laser light can be detected by photoelectric sensor 13.When the active metal molten drop sprays, usually can be because the accumulation of nozzle place oxide skin, cause spraying crooked with interrupt.At this moment, molten drop reflector laser signal will occur to change accordingly or can't detect reflected signal.This moment, Photoelectric Signal Processing unit 14 was through contrasting with the experience situation, send nozzle cleaning signal to exciting driver 15, to repeat the nozzle cleanup step: apply large air pressure by moment, with going out " to dodge spray " at a high speed of nozzle interior molten metal, thereby take the oxide skin and the impurity that are gathered in herein out of, reach the purpose of dredging nozzle.
Claims (4)
1. metal drop injection apparatus, comprise heater (6), crucible (7), nozzle (9) and exciting rod (1), it is characterized in that: also comprise sensor block (2), coldplate (4), solenoid (3), thermal insulation board (5), laser instrument (12), photoelectric sensor (13), Photoelectric Signal Processing unit (14), thermocouple (16), exciting driver (15), filter (17); Exciting rod (1) passes coldplate (4) and thermal insulation board (5) from top to bottom in the crucible (7), crucible (7) is provided with a pressure entrance (18) near the place, top, center, crucible (7) bottom is nozzle (9), by nozzle (9) metal injection liquation (8); Heater (6) is equipped with in the outside of crucible (7), and crucible (7) bottom outside is installed thermocouple (16); Sensor block (2) places solenoid (3) inside, exciting driver (15) produces accumulation signal, drive electromagnetic induction coil (3), electromagnetic induction coil (3) produces a pulse magnetic and acts on sensor block (2), sensor block (2) drives exciting rod (1) downwards, exciting rod (1) is delivered to crucible (7) bottom nozzle (9) with these mechanical oscillation and locates, and realizes the injection of minute metallic molten drop (10); The light beam that metal drop after the injection (10) is walked laser generator (12), reflect beams of laser light, photoelectric sensor (13) detects the variation of laser light signal, feeds back to Photoelectric Signal Processing unit (14).
2. metal drop injection apparatus according to claim 1 is characterized in that: the material of described crucible (7) is pottery.
3. metal drop injection apparatus according to claim 1, it is characterized in that: the material of described crucible (7) is graphite.
4. metal drop injection apparatus according to claim 1, it is characterized in that: the material of described sensor block (2) is paramagnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220241886 CN202684090U (en) | 2012-05-28 | 2012-05-28 | Metal drop spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220241886 CN202684090U (en) | 2012-05-28 | 2012-05-28 | Metal drop spraying device |
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| Publication Number | Publication Date |
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| CN202684090U true CN202684090U (en) | 2013-01-23 |
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| CN 201220241886 Withdrawn - After Issue CN202684090U (en) | 2012-05-28 | 2012-05-28 | Metal drop spraying device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672193A (en) * | 2012-05-28 | 2012-09-19 | 西北工业大学 | Metal molten drop ejecting device and method for ejecting high-melting-point metal molten drops using same |
| CN103394695A (en) * | 2013-07-26 | 2013-11-20 | 常州大学 | Spray forming equipment and processing control method thereof |
| CN105108147A (en) * | 2015-09-21 | 2015-12-02 | 江苏豪然喷射成形合金有限公司 | Production process for achieving ingot blank continuous spray deposition |
| WO2019101436A1 (en) * | 2017-11-27 | 2019-05-31 | Robert Bosch Gmbh | Printhead for a 3d printer and method for starting-up a printhead of a 3d printer |
| CN110624751A (en) * | 2019-10-31 | 2019-12-31 | 兰州理工大学 | High-speed metal droplet/substrate collision device under action of composite field and use method |
| CN110877003A (en) * | 2019-12-26 | 2020-03-13 | 安徽工业大学 | Method and device for spraying inner wall of hole part based on double-pulse strong laser technology |
| CN111390174A (en) * | 2020-04-16 | 2020-07-10 | 佛山市孔星材料应用研究院有限公司 | 3D printing metal spraying equipment, 3D printing device and control method thereof |
| CN112519124A (en) * | 2020-11-16 | 2021-03-19 | 内蒙古农业大学 | Injection mould device |
| CN113416954A (en) * | 2021-07-02 | 2021-09-21 | 湘潭大学 | Laser cladding nozzle with real-time self-cleaning function and laser cladding equipment |
-
2012
- 2012-05-28 CN CN 201220241886 patent/CN202684090U/en not_active Withdrawn - After Issue
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672193A (en) * | 2012-05-28 | 2012-09-19 | 西北工业大学 | Metal molten drop ejecting device and method for ejecting high-melting-point metal molten drops using same |
| CN103394695A (en) * | 2013-07-26 | 2013-11-20 | 常州大学 | Spray forming equipment and processing control method thereof |
| CN103394695B (en) * | 2013-07-26 | 2015-06-24 | 常州大学 | Spray forming equipment and processing control method thereof |
| CN105108147A (en) * | 2015-09-21 | 2015-12-02 | 江苏豪然喷射成形合金有限公司 | Production process for achieving ingot blank continuous spray deposition |
| WO2019101436A1 (en) * | 2017-11-27 | 2019-05-31 | Robert Bosch Gmbh | Printhead for a 3d printer and method for starting-up a printhead of a 3d printer |
| CN110624751A (en) * | 2019-10-31 | 2019-12-31 | 兰州理工大学 | High-speed metal droplet/substrate collision device under action of composite field and use method |
| CN110624751B (en) * | 2019-10-31 | 2024-07-23 | 兰州理工大学 | High-speed metal droplet/substrate collision device under action of composite field and application method |
| CN110877003A (en) * | 2019-12-26 | 2020-03-13 | 安徽工业大学 | Method and device for spraying inner wall of hole part based on double-pulse strong laser technology |
| CN111390174A (en) * | 2020-04-16 | 2020-07-10 | 佛山市孔星材料应用研究院有限公司 | 3D printing metal spraying equipment, 3D printing device and control method thereof |
| CN112519124A (en) * | 2020-11-16 | 2021-03-19 | 内蒙古农业大学 | Injection mould device |
| CN113416954A (en) * | 2021-07-02 | 2021-09-21 | 湘潭大学 | Laser cladding nozzle with real-time self-cleaning function and laser cladding equipment |
| CN113416954B (en) * | 2021-07-02 | 2023-07-25 | 湘潭大学 | Laser cladding nozzle with real-time self-cleaning function and laser cladding equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130123 Effective date of abandoning: 20130828 |
|
| RGAV | Abandon patent right to avoid regrant |