CN205362673U - SLM gas protection system - Google Patents
SLM gas protection system Download PDFInfo
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- CN205362673U CN205362673U CN201620029034.8U CN201620029034U CN205362673U CN 205362673 U CN205362673 U CN 205362673U CN 201620029034 U CN201620029034 U CN 201620029034U CN 205362673 U CN205362673 U CN 205362673U
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- forming bin
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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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Abstract
The utility model discloses a SLM gas protection system, contain level sensor, water including level sensor, pressure sensor, evacuation passageway, gas circulation passageway, an inlet channel, the 2nd inlet channel, electrical control system and industrial computer including molded cartridge, illumination heating device, automatically controlled pressure relief valve, oxygen. The utility model discloses a set up two way inlet channel, to the metal powder of difference, can directly select required protective gas, form the gas protection environment, through increased the evacuation passageway on molded cartridge, form a vacuum environmental protection on the one hand, on the other hand has shortened the gaseous time of change, has reduced gaseous loss.
Description
Technical field
This utility model relates to 3D printing technique field, especially a kind of SLM gas protection system.
Background technology
Selective laser melted (Selectivelasermelting is called for short SLM) is the Laser Processing emerging application of one in quick forming fabri-cation field, quickly can go out the metal parts close to complete consistency by straight forming with it.Selective laser fusion technology overcomes selective laser sintering (SelectiveLaserSintering is called for short SLS) technology and manufactures the puzzlement of metal parts complex technical process.
Selective laser smelting process uses metal dust, and metal dust is scanned irradiating under the manipulation of computer and realizes the melted of material by the optics such as laser instrument, galvanometer, field lens, realizes molding by the accumulation layer by layer of material.The whole process unit that selective laser melts is made up of powder cylinder and moulding cylinder.During work, powder cylinder piston (powder feeding piston) rises, by scraper by powder at the upper uniform spreading last layer of moulding cylinder piston (working piston), computer controls the two-dimensional scan track of laser beam according to the hierarchical model of prototype, and sintering solid dusty material is to form an aspect of part selectively.After powder completes one layer, moulding cylinder piston one thickness of decline, paving powder system spreads new powder.Control laser beam and scan the new layer of sintering again.So move in circles, be layering, until 3 d part molding.Finally, by unsintered Powder Recovery to powder cylinder, and take out profiled member.
Due to the characteristic of metal powder material, the forming bin of selective laser fusion apparatus needs to add inert protective gas and forms gas shield environment when printing shaping, and carries out printing heating (80-160 DEG C) to the metal dust of forming bin.Further, for different metal powder materials, the protective gas required when printing shaping is different.
nullPatent of invention in China's application，Application number is the patent of 201310024477.9，Its scheme is: a kind of selective laser melting SLM atmosphere protection system，It is characterized in that including being internally provided with selective laser melting SLM shapes the metal enclosed nacelle (5) of operating mechanism (1)，Metal enclosed nacelle (5) is internal is additionally provided with temperature-controlled air conditioner (2)，Temperature-controlled air conditioner (2) controls to be connected with the central control system (9) of metal enclosed cabin (5) outside，This central control system (9) communicates to connect with the host computer (17) with man machine interface，Inside there is the inert gas container (10) of noble gas by inert gas duct (12) and metal enclosed nacelle (5) conducting，Inert gas duct (12) is provided with the air inlet electromagnetic valve (11) that same central control system (9) phase control connects，Oxygen depurator (13) is conducted with metal enclosed nacelle (5) with two pipelines，Wherein a pipeline is provided with the first valve (14)，An other pipeline is provided with the second valve (16)、Circulating fan (15) and stretch into the molecular sieve (3) in metal enclosed nacelle (5) part at this pipeline.
Program only one of which inert gas container, cannot be made directly selection either directly through control system when changing gas and change, it has not been convenient to；Air pressure in inert gas container can not be monitored by the program in real time, it is necessary to by manual detection gas in container force value；The forming bin no pressure release device of the program, it is impossible to pressure in surge bunker；It is longer to carry out the time required during inert gas replacement before program forming bin house print, and gas consumption is bigger.
Utility model content
For problem above, the disclosed a kind of SLM gas protection system of this utility model, by arranging two-way inlet channel, for different metal dusts, it is possible to directly choose required protective gas, form gas shield environment；By adding evacuation passageway on forming bin, form a vacuum protection environment on the one hand, shorten the time changing gas on the other hand, decrease the loss of gas；By arranging pressure transducer, the force value in monitoring gas cylinder at any time；By arranging electrohydraulic pressure control relief valve, it is ensured that be in steady pressure environment in forming bin.
The disclosed a kind of SLM gas protection system of this utility model; including forming bin, illumination heater, electrohydraulic pressure control relief valve, oxygen level sensor, water content sensor, pressure transducer, evacuation passageway, gas circulation channel, the first inlet channel, the second inlet channel, electrical apparatus control system and industrial computer, it is characterised in that: described illumination heater is arranged on inside forming bin；
Described electrohydraulic pressure control relief valve, oxygen level sensor, water content sensor and pressure transducer are arranged on forming bin；
Described evacuation passageway is made up of the first filter, the first electric-controlled switch valve and vacuum pump, and described evacuation passageway is connected on forming bin；
Described gas circulation channel is made up of the second filter, moisture filter, the 3rd filter, the second electric-controlled switch valve, oxygen depurator and circulating fan, and described gas circulation channel is connected on forming bin；
The first described inlet channel is regulated valve, the first pressure transducer and the first gas cylinder by the 3rd electric-controlled switch valve, the first electrohydraulic pressure control and forms, and the first described inlet channel is connected in gas circulation channel；
The second described inlet channel is regulated valve, the second pressure transducer and the second gas cylinder by the 4th electric-controlled switch valve, the second electrohydraulic pressure control and forms, and the second described inlet channel is connected in gas circulation channel；
Described electrical apparatus control system is connected with industrial computer, and controls all of automatically controlled signal.
Illumination heater described in the utility model integrates illumination and heating function, and heating-up temperature is monitored temperature sensor by electrical apparatus control system and is controlled.
Oxygen level sensor described in the utility model value is set less than or equal to 1PPM.
Water content sensor described in the utility model value is set less than or equal to 5PPM.
Pressure transducer described in the utility model value is set less than or equal to 0.1MPa.
In first gas cylinder described in the utility model, filled gas is a kind of in nitrogen, helium, neon, argon, krypton, xenon.
In second gas cylinder described in the utility model, filled gas is a kind of in nitrogen, helium, neon, argon, krypton, xenon.
Advantage of the present utility model is:
1, for different metal dusts, it is possible to directly choose required protective gas, gas shield environment is formed；
2, detect the gas content in gas cylinder in real time, facilitate when user changes gas cylinder；
3, adopt vacuum pump, first to forming bin evacuation, then carry out the displacement of inert protective gas again, shorten the time needed for forming bin displacement protective gas；
4, adding gas circulation channel, constantly gas in storehouse carried out deoxygenation, dewater, dedusting in print procedure, what reduce noble gas makes consumption, it is ensured that gaseous environment required during printing；
5, adopt vacuum pump, it is possible to forming bin evacuation, make equipment have printing various metals material, such as magnesium powder.
Accompanying drawing explanation
Fig. 1 position structural representation of the present utility model.
1, forming bin 2, illumination heater 3, electrohydraulic pressure control relief valve 4, oxygen level sensor 5, water content sensor 6, pressure transducer 7, first filter 8, first electric-controlled switch valve 9, vacuum pump 10, second filter 11, moisture filter 12, 3rd filter 13, second electric-controlled switch valve 14, oxygen depurator 15, circulating fan 16, 3rd electric-controlled switch valve 17, first electrohydraulic pressure control regulates valve 18, first pressure transducer 19, first gas cylinder 20, 4th electric-controlled switch valve 21, second electrohydraulic pressure control regulates valve 22, second pressure transducer 23, second gas cylinder 24, electrical apparatus control system 25, industrial computer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, it is further elucidated with this utility model, it should be understood that following detailed description of the invention is merely to illustrate this utility model rather than limits scope of the present utility model, after having read this utility model, the amendment of the various equivalent form of values of utility model is all fallen within the application claims limited range by those skilled in the art.
As it is shown in figure 1, the utility model discloses a kind of SLM gas protection system, including the internally installed forming bin 1 having illumination heater 2；It is directly installed on the oxygen level sensor 4 on forming bin 1, water content sensor 5, pressure transducer 6 and electrohydraulic pressure control relief valve 3；Gas circulation channel is formed with the second filter 10 by the 3rd filter the 12, second electric-controlled switch valve 13, oxygen depurator 14, circulating fan 15, moisture filter 11；Regulated valve 17 by first gas cylinder the 19, first pressure transducer the 18, first electrohydraulic pressure control and form the first inlet channel with the 3rd electric-controlled switch valve；Regulated valve 21 by second gas cylinder the 23, second pressure transducer the 22, second electrohydraulic pressure control and form the second inlet channel with the 4th electric-controlled switch valve 20；Inert protective gas, when entering forming bin by the first inlet channel or the second inlet channel, can first pass through moisture filter the 11, second filter 10 in gas circulation channel；Be made up of the passage of evacuation first filter the 7, first electric-controlled switch valve 8 and vacuum pump 9, this passage is directly installed on forming bin；All automatically controlled signals of this gas protection system all can be linked on electrical apparatus control system 24, controls electrical apparatus control system 24 when SLM device printing shaping by industrial computer 25 and realizes the control to whole gas protection system.
Operation principle of the present utility model is: close forming bin 1 afterwards the powder cylinder of SLM device is added metallic print material (such as powder of stainless steel, cobalt-chromium alloy powder, titanium valve), industrial computer 25 selects the print routine of corresponding printed material, owing to being integrated with required gaseous environment in print routine, controlling the condition such as parameter of system, at this moment program can automatically select noble gas in the gas passage needing to use.
When in needs use the first gas cylinder, gas is as inert protective gas: forming bin 1 first ensures to close, and system can first start the evacuation function of gas protection system.At this moment the first electric-controlled switch valve 8 energising in the passage of evacuation is opened, and starts vacuum pump 9 and forming bin 1 is carried out evacuation；When pressure transducer 6 detects that in storehouse, vacuum reaches 50%, the first electric-controlled switch valve 8 cuts out, and vacuum pump 9 is also switched off, and system evacuation terminates.After forming bin 1 evacuation is terminated, the 3rd electric-controlled switch valve 16 in first inlet channel is opened, the gas in first gas cylinder 19 moisture filter the 11, second filter 10 in gas circulation channel enters in forming bin 1, when the gas pressure value in forming bin 1 returns to atmospheric pressure, opening the first electric-controlled switch valve 8 in evacuation passageway, system formally enters the replacement process to forming bin 1 internal gas.When oxygen level sensor 4 detects lower than 1PMM, water content sensor 5, oxygen content value in storehouse detects that moisture is lower than 5PMM and when ensureing that in the storehouse that pressure transducer 6 detects, force value is lower than 0.1MPa, the gas displacement process in forming bin 1 terminates.
In order to ensure the stable inert gas shielding environment required in print job of SLM device and in real time to the removing flying upward dust, smog in storehouse; when, after the gas displacement end-of-job of gas protection system, system starts the gas circulation channel with oxygen purification function and dust, smoke purification function automatically.At this moment the second electric-controlled switch valve 13 starts, circulating fan 15 starts, the gas containing dust, smog that forming bin 1 is formed when printing can pass through the gas circulation channel that is made up of with the second filter 10 the 3rd filter 12, oxygen depurator 14, circulating fan 15, moisture filter 11 constantly to storehouse in gas carry out dedusting, deoxygenation, the operation that dewaters, it is ensured that meet and print required gaseous environment.
When need to use gas is as inert protective gas in the second gas cylinder time: the work process of gas protection system is basically identical with operation when using that in the first gas cylinder, gas is as protective gas, only being regulated valve 21 by second gas cylinder the 23, second pressure transducer the 22, second electrohydraulic pressure control and form the second inlet channel with the 4th electric-controlled switch valve 20 of startup when forming bin 1 is carried out gas displacement.
No matter it is the first inlet channel or the second inlet channel, cue can be sent to control system when the first pressure transducer 18 detects the force value in gas bottle lower than 0.3MPa with the second pressure transducer 22, it is necessary to prepare to change gas cylinder.When force value is lower than setting value (0.1MPa), equipment can not start, and can point out and need to change gas cylinder.
In further scheme, described illumination heater is arranged on the inside of forming bin, and this device integrates the function of illumination and heating, and the temperature of heating is controlled by temperature sensor；
In further scheme, described oxygen level sensor, water content sensor, pressure transducer and electrohydraulic pressure control relief valve are directly installed on forming bin top, the value that arranges of oxygen level sensor is less than or equal to 1PPM, the value that arranges of water content sensor is less than or equal to 5PPM, and the alarming value of pressure transducer is set greater than being equal to 0.1MPa.
In further scheme, being provided with two-way inlet channel, the inert protective gas that different inlet channels is corresponding different in described system, the electric-controlled switch valve break-make that the type of gas is controlled in passage by mainframe program selects.
In further scheme, the electrohydraulic pressure control in described inlet channel regulates valve, is used to regulate noble gas admission pressure.
In further scheme, the described pressure transducer in inlet channel, it is possible to the gas pressure in detection gas cylinder in real time, point out user storage pressure value, inform and when need to change gas cylinder.
In further scheme; described gas circulation channel; two ends are connected with forming bin; inert gas environment in forming bin can start this gas circulation channel when reaching to print necessary requirement automatically; inert protective gas within forming bin can be carried out oxygen purification by the startup of this passage always, moisture is absorbed, and the filter of this passage can also play and purify the smog that the metallic dust within forming bin is formed with printing simultaneously.
In further scheme; the passage of described evacuation is directly connected with forming bin, when forming bin is replaced inert protective gas, first with vacuum pump to evacuation in storehouse; vacuum reaches to arrange startup inlet channel when requiring, so can be greatly shortened the time needed for gas displacement.
Claims (7)
1. a SLM gas protection system; including forming bin, illumination heater, electrohydraulic pressure control relief valve, oxygen level sensor, water content sensor, pressure transducer, evacuation passageway, gas circulation channel, the first inlet channel, the second inlet channel, electrical apparatus control system and industrial computer, it is characterised in that: described illumination heater is arranged on inside forming bin；
Described electrohydraulic pressure control relief valve, oxygen level sensor, water content sensor and pressure transducer are arranged on forming bin；
Described evacuation passageway is made up of the first filter, the first electric-controlled switch valve and vacuum pump, and described evacuation passageway is connected on forming bin；
Described gas circulation channel is made up of the second filter, moisture filter, the 3rd filter, the second electric-controlled switch valve, oxygen depurator and circulating fan, and described gas circulation channel is connected on forming bin；
The first described inlet channel is regulated valve, the first pressure transducer and the first gas cylinder by the 3rd electric-controlled switch valve, the first electrohydraulic pressure control and forms, and the first described inlet channel is connected in gas circulation channel；
The second described inlet channel is regulated valve, the second pressure transducer and the second gas cylinder by the 4th electric-controlled switch valve, the second electrohydraulic pressure control and forms, and the second described inlet channel is connected in gas circulation channel；
Described electrical apparatus control system is connected with industrial computer, and controls all of automatically controlled signal.
2. a kind of SLM gas protection system according to claim 1, it is characterised in that: described illumination heater integrates illumination and heating function, and heating-up temperature is monitored temperature sensor by electrical apparatus control system and is controlled.
3. a kind of SLM gas protection system according to claim 1, it is characterised in that: described oxygen level sensor value is set less than or equal to 1PPM.
4. a kind of SLM gas protection system according to claim 1, it is characterised in that: described water content sensor value is set less than or equal to 5PPM.
5. a kind of SLM gas protection system according to claim 1, it is characterised in that: described pressure transducer value is set less than or equal to 0.1MPa.
6. a kind of SLM gas protection system according to claim 1, it is characterised in that: in the first described gas cylinder, filled gas is a kind of in nitrogen, helium, neon, argon, krypton, xenon.
7. a kind of SLM gas protection system according to claim 1, it is characterised in that: in the second described gas cylinder, filled gas is a kind of in nitrogen, helium, neon, argon, krypton, xenon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620029034.8U CN205362673U (en) | 2016-01-13 | 2016-01-13 | SLM gas protection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620029034.8U CN205362673U (en) | 2016-01-13 | 2016-01-13 | SLM gas protection system |
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| CN205362673U true CN205362673U (en) | 2016-07-06 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105946243A (en) * | 2016-04-26 | 2016-09-21 | 广东汉邦激光科技有限公司 | Deoxygenation method and 3D printing method applied in 3D printer |
| CN106041081A (en) * | 2016-07-25 | 2016-10-26 | 南京前知智能科技有限公司 | Special selective laser melting (SLM) equipment for dental department |
| CN107626920A (en) * | 2016-07-18 | 2018-01-26 | 中国兵器装备研究院 | A kind of double-layer gas shield container |
| CN107661980A (en) * | 2016-07-29 | 2018-02-06 | 上海微电子装备（集团）股份有限公司 | Environment control method in 3D printing device and 3D printing device |
| CN108031846A (en) * | 2017-12-11 | 2018-05-15 | 昆明理工大学 | A kind of airflow circulating heating and filtering device for SLM processes |
| CN108031845A (en) * | 2017-12-08 | 2018-05-15 | 上海航天设备制造总厂有限公司 | The control climate method of SLM device forming cavity |
| CN108213433A (en) * | 2018-01-25 | 2018-06-29 | 安徽科元三维技术有限公司 | SLM print control systems |
| CN108500269A (en) * | 2018-05-09 | 2018-09-07 | 上海航天设备制造总厂有限公司 | SLM device vacuum tank Pneumatic pressure control loop system |
| CN109807328A (en) * | 2017-11-20 | 2019-05-28 | 大族激光科技产业集团股份有限公司 | Selective laser melting system, gas-recycling plant and Method of printing |
| CN110181055A (en) * | 2019-07-02 | 2019-08-30 | 佛山科学技术学院 | A kind of metal 3D printer intelligence deoxygenation circulation purifying method and equipment |
| CN111687549A (en) * | 2020-06-04 | 2020-09-22 | 西安交通大学 | Atmosphere monitoring system and monitoring method for laser/electric arc material increase and decrease manufacturing equipment |
| CN112620088A (en) * | 2020-12-30 | 2021-04-09 | 浙江拓博环保科技有限公司 | Powder conveying and screening circulating method and system |
| CN113681885A (en) * | 2020-05-19 | 2021-11-23 | 广东汉邦激光科技有限公司 | Multi-workpiece 3D printing device and multi-workpiece 3D printing method |
| US11426941B2 (en) | 2018-02-09 | 2022-08-30 | Concept Laser Gmbh | Method for calibrating at least one apparatus for additively manufacturing three-dimensional objects |
| CN115156557A (en) * | 2022-07-21 | 2022-10-11 | 南京铖联激光科技有限公司 | Real-time dust collector of 3D printing |
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2016
- 2016-01-13 CN CN201620029034.8U patent/CN205362673U/en active Active
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105946243A (en) * | 2016-04-26 | 2016-09-21 | 广东汉邦激光科技有限公司 | Deoxygenation method and 3D printing method applied in 3D printer |
| CN107626920B (en) * | 2016-07-18 | 2019-07-26 | 中国兵器装备研究院 | A kind of double-layer gas shield container |
| CN107626920A (en) * | 2016-07-18 | 2018-01-26 | 中国兵器装备研究院 | A kind of double-layer gas shield container |
| CN106041081A (en) * | 2016-07-25 | 2016-10-26 | 南京前知智能科技有限公司 | Special selective laser melting (SLM) equipment for dental department |
| CN107661980A (en) * | 2016-07-29 | 2018-02-06 | 上海微电子装备（集团）股份有限公司 | Environment control method in 3D printing device and 3D printing device |
| CN107661980B (en) * | 2016-07-29 | 2020-02-21 | 上海微电子装备（集团）股份有限公司 | 3D printing device and environment monitoring method in 3D printing device |
| CN109807328A (en) * | 2017-11-20 | 2019-05-28 | 大族激光科技产业集团股份有限公司 | Selective laser melting system, gas-recycling plant and Method of printing |
| CN108031845A (en) * | 2017-12-08 | 2018-05-15 | 上海航天设备制造总厂有限公司 | The control climate method of SLM device forming cavity |
| CN108031845B (en) * | 2017-12-08 | 2020-01-07 | 上海航天设备制造总厂有限公司 | Atmosphere control method of SLM (selective laser melting) equipment forming cavity |
| CN108031846A (en) * | 2017-12-11 | 2018-05-15 | 昆明理工大学 | A kind of airflow circulating heating and filtering device for SLM processes |
| CN108031846B (en) * | 2017-12-11 | 2019-09-27 | 昆明理工大学 | A kind of airflow circulating heating and filtering device for SLM process |
| CN108213433A (en) * | 2018-01-25 | 2018-06-29 | 安徽科元三维技术有限公司 | SLM print control systems |
| US11426941B2 (en) | 2018-02-09 | 2022-08-30 | Concept Laser Gmbh | Method for calibrating at least one apparatus for additively manufacturing three-dimensional objects |
| CN108500269A (en) * | 2018-05-09 | 2018-09-07 | 上海航天设备制造总厂有限公司 | SLM device vacuum tank Pneumatic pressure control loop system |
| CN110181055A (en) * | 2019-07-02 | 2019-08-30 | 佛山科学技术学院 | A kind of metal 3D printer intelligence deoxygenation circulation purifying method and equipment |
| CN110181055B (en) * | 2019-07-02 | 2024-05-28 | 佛山科学技术学院 | Intelligent deoxidization circulation purification method and equipment for metal 3D printer |
| CN113681885A (en) * | 2020-05-19 | 2021-11-23 | 广东汉邦激光科技有限公司 | Multi-workpiece 3D printing device and multi-workpiece 3D printing method |
| CN111687549A (en) * | 2020-06-04 | 2020-09-22 | 西安交通大学 | Atmosphere monitoring system and monitoring method for laser/electric arc material increase and decrease manufacturing equipment |
| CN112620088A (en) * | 2020-12-30 | 2021-04-09 | 浙江拓博环保科技有限公司 | Powder conveying and screening circulating method and system |
| CN115156557A (en) * | 2022-07-21 | 2022-10-11 | 南京铖联激光科技有限公司 | Real-time dust collector of 3D printing |
| CN115156557B (en) * | 2022-07-21 | 2023-10-13 | 南京铖联激光科技有限公司 | Real-time dust collector is printed to 3D |
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