CN106111989A - A kind of protective gas pre-heating mean printed for 3D and device - Google Patents
A kind of protective gas pre-heating mean printed for 3D and device Download PDFInfo
- Publication number
- CN106111989A CN106111989A CN201610687420.0A CN201610687420A CN106111989A CN 106111989 A CN106111989 A CN 106111989A CN 201610687420 A CN201610687420 A CN 201610687420A CN 106111989 A CN106111989 A CN 106111989A
- Authority
- CN
- China
- Prior art keywords
- gas
- preheating
- vacuum
- cavity
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
-
- 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
- B22F10/322—Process control of the atmosphere, e.g. composition or pressure in a building chamber of the gas flow, e.g. rate or direction
-
- 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
- B22F10/70—Recycling
- B22F10/77—Recycling of gas
-
- 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
-
- 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
- B22F12/70—Gas flow means
-
- 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
-
- 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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- 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
Abstract
The invention discloses a kind of protective gas pre-heating mean printed for 3D and device；Including outside protective covers, the vacuum preheating cavity that is arranged in outside protective covers；The gas heating path that two line structures are identical it is provided with inside vacuum preheating cavity；Gas is entered after gas heating path is heated by air inlet and enters in vacuum preheating cavity, then is entered forming room by gas outlet；Each gas heating path is divided into again the subchannel of two step heating；This structure not only increases noble gas in the path entering vacuum preheating cavity, and by the method for gradually step heating, make the noble gas after heating more stable, not only reduce the temperature difference between laser scanning region and forming cavity indoor gas, moulding cylinder and powder cylinder endosexine metal dust can persistently be preheated by the noble gas after post bake simultaneously, greatly reduce the interior temperature difference with interlayer of machined layer, reduce thermal stress, thus reduce the residual stress in SLM forming process and deformation.
Description
Technical field
The present invention relates to selective laser fusing metal 3D and print (SLM) technical field, particularly relate to a kind of for 3D printing
Protective gas pre-heating mean and device.
Background technology
3D printing technique, also referred to as increases material manufacturing technology, and its appearance changes conventionally manufactured pattern.Selective laser is melted
(SLM) technology is the one that metal 3D prints, and its forming principle is that the threedimensional model of design is separated into profile in layer
Information, controls laser beam flying metal dust and forms molten road, and molten road mutually overlaps formation aspect, and aspect is stacked into three Vygens one by one
Belong to part.Compared with traditional manufacturing technology, one of advantage that SLM technology is prominent is almost can be with the arbitrarily complicated structure of straight forming
And there is the function part of complete metallurgical binding, consistency can reach intimate 100%, and its range of application has been extended to biological doctor
The fields such as treatment, Aero-Space, automobile.
SLM processing part is the process of a high energy laser beam and metal dust effect, owing to metal material is at high temperature
Under easily react with the oxygen in air, oxide has the biggest negative influence to Forming Quality so that material moistening
Property be greatly reduced, hinder between layers, metallurgical binding ability between molten road；Simultaneously molding during SLM often
Evoking some flue gases, exhaust gas volumn will be different regarding material and moulding process difference, but always be difficult to avoid.These flue gases are being grown
In the forming process of time, can progressively be accumulated on molding indoor article, powder, transmissive mirror, Pu Fen mechanism are all polluted,
Reduce Forming Quality, even because transmissive mirror is stained significantly, cause molding to interrupt.So in order to prevent metal dust at quilt
There is oxidation during laser facula fusing and reduce the flue dust impact on molding, generally will lead in whole forming process
Enter noble gas, usually argon or nitrogen so that the oxygen content in forming room drops to the lowest level.
During using SLM processing part, the biggest thermal stress can be produced, because the effect of laser and metal dust is
One rapid melting, the process of rapid solidification, the highest transient temperature even can reach more than 2000 degrees Celsius, and this mistake
Journey occurred within the extremely short time.Generally, the gas discharged from standard gas cylinder is close to room temperature, powder cylinder and moulding cylinder
Endosexine metal powder is not when having an effect with laser, and temperature is close to the temperature of molding indoor gas.In actual processing, laser is swept
Retouch powder area and Non-scanning mode powder area, in scanning area and forming room, between noble gas, form the biggest temperature ladder
Degree, Material shrinkage is inconsistent, forms bigger thermal stress and residual stress so that part occurs deformation during processing.
Occurring in the course of processing that excessive thermal stress even can cause support to be pulled off, there is serious warpage in machined layer, both affects
The form accuracy of part and dimensional accuracy, also can damage flexible paving and paint.
Summary of the invention
It is an object of the invention to overcome the shortcoming and defect of above-mentioned prior art, it is provided that a kind of protection printed for 3D
Gas pre-heating mean and device.The present invention is heated by secondary cascade, makes the noble gas after heating more stable, not only reduces
Temperature difference between laser scanning region and forming cavity indoor gas, the noble gas after post bake can be the most right simultaneously
Moulding cylinder and powder cylinder endosexine metal dust preheat, and greatly reduce the interior temperature difference with interlayer of machined layer, and reducing heat should
Power, thus reduce the residual stress in SLM forming process and deformation.
The present invention is achieved through the following technical solutions:
A kind of for 3D print protective gas preheating device, including outside protective covers 3, be arranged in outside protective covers 3 true
Empty preheating cavity 81 and be separately positioned on the air inlet 1 of vacuum preheating cavity 81 one end and the gas outlet 9 of the other end；Described vacuum
Preheating cavity 81 is internal is provided with the identical gas heating path of two line structures 13；Gas is entered gas heating path 13 by air inlet 1
Enter in vacuum preheating cavity 81 after Bei Jiare, then entered forming room by gas outlet 9.
Multiple spaced, electrical heating post 6 of array arrangement it is provided with in gas heating path 13；Described electrical heating post 6
Axis be perpendicular to gas flow direction；Enter after the gas in gas heating path 13 is electrically heated post 6 heating and enter vacuum
In preheating cavity 81.
The middle part of described gas heating path 13 is additionally provided with a dividing plate 131, and gas heating path 13 is split by this dividing plate 131
Become the first preheating channel 132 and the second preheating channel 133；Electrical heating post 6 is distributed in the first preheating channel 132 and the second preheating is logical
On the internal face in road 133；Temperature in second preheating channel 133 is more than the temperature in the first preheating channel 132；First preheating is logical
Road 132 and the second preheating channel 133 provide a step temp. rising and circuitous flow path for gas；
Gas is introduced into the first preheating channel 132 and tentatively preheats, and the gas of preliminary preheating enters the second preheating channel
133 carry out post bake intensification, complete the gas after post bake heats up and enter in vacuum preheating cavity 81, then are entered by gas outlet 9
Enter forming room.
It is distributed in the electrical heating post 6 of the second preheating channel 133 to arrange density, more than the electrical heating of the first preheating channel 132
Post 6 is arranged density.
Diverter 2 it is provided with between air inlet 1 and two-way gas heating path 13；Diverter 2 will enter its interior gas
Each road gas heating path 13 it is respectively fed to after being divided into two-way.
Described protective gas preheating device also includes that one is reclaimed for reclaiming the gas of vacuum preheating cavity 81 internal gas
Bottle 14 and an air feed bottle 15 being used for providing gas to vacuum preheating cavity 81；
The import of gas returnable bottle 14 is by the pipeline connection vacuum preheating cavity 81 with a water-cooled glass tubing 12, in vacuum
Preheating cavity 81 is provided with air relief valve 11 with the seam of this pipeline；The gas outlet of gas returnable bottle 14 and air feed bottle 15 is equipped with a valve
Door also connects air inlet 1 by three-way valve.
Described vacuum preheating cavity 81 is the vacuum cavity being encircled into by vacuum glass liner 8；Described vacuum glass liner 8
Asbestos heat-insulation layer 4 it is provided with between outer wall and outside protective covers 3.
Pressure-detecting device 5 and temperature-detecting device 7 are installed in described vacuum preheating cavity 81；
Pressure-detecting device 5 is for detecting the air pressure in vacuum preheating cavity 81, and it is pre-that temperature-detecting device 7 is used for detecting vacuum
Temperature in hot chamber 81；The gas outlet 9 of vacuum preheating cavity 81 is provided with the effusion meter 10 for detected gas flow.
The method that gas is preheated by the above-mentioned protective gas preheating device printed for 3D is as follows:
The preliminary preheating step of noble gas:
Noble gas in air feed bottle 15 and/or gas returnable bottle 14, after three-way valve, is entered diverter by air inlet 1
2, after being divided into two-way in diverter 2, it is admitted in the first preheating channel 132 of each road gas heating path 13, by electrical heating
It is carried out preheating for the first time by post 6, completes the preliminary preheating of noble gas；
The heating steps again of noble gas:
After noble gas completes tentatively to preheat in the first preheating channel 132, subsequently enter the second preheating channel 133 and carry out
Post bake, makes the inert gas temperature in entrance the second preheating channel 133 more than the temperature when the first preheating channel 132；
Step temp. rising that noble gas is constituted at the first preheating channel 132 and the second preheating channel 133 successively and roundabout stream
Behind dynamic path, enter in vacuum preheating cavity 81, finally entered forming room by gas outlet 9.
In the work process of protective gas preheating device, in pressure-detecting device 5 detects vacuum preheating cavity 81
When air pressure is higher than setting value, unlatching air relief valve 11 is by being higher than the noble gas of setting value in vacuum preheating cavity 81, through water-cooled glass
Send in gas returnable bottle 14 after glass pipe 12 cooling and store；Treat that the air pressure in vacuum preheating cavity 81 recovers to setting value or setting value
Time following, close air relief valve 11.
The present invention, relative to prior art, has such advantages as and effect:
Vacuum preheating cavity 81 of the present invention is provided with gas heating path 13；Enter the gas in gas heating path 13 electric
Enter back in vacuum preheating cavity 81 after heated beam 6 heating；It is pre-that gas heating path 13 includes the first preheating channel 132 and second
The passage of heat 133；Temperature in second preheating channel 133 is more than the temperature in the first preheating channel 132；First preheating channel 132
A step temp. rising and circuitous flow path is provided for gas with the second preheating channel 133.Air feed bottle 15 and/or gas returnable bottle
Noble gas in 14, after three-way valve, is entered diverter 2 by air inlet 1, after being divided into two-way, is admitted in diverter 2
In first preheating channel 132 of each road gas heating path 13, electrical heating post 6 carry out preheating for the first time to it, subsequently enter
Second preheating channel 133 carries out post bake, makes the inert gas temperature in entrance the second preheating channel 133 pre-more than first
The temperature during passage of heat 132；The step liter that noble gas is constituted at the first preheating channel 132 and the second preheating channel 133 successively
After temperature and circuitous flow path, enter in vacuum preheating cavity 81, finally entered forming room by gas outlet 9.The configuration achieves
Heating the step of noble gas, make noble gas heating-up temperature grow steadily, metal 3D steadily, and then is printed by gas flowing
(SLM) (protection) noble gas led in the course of processing preheats.When laser scanning metal dust when, owing to entering
It is temperature required that the metal dust of forming room's scanning slice and noble gas have been preheating to ratio, during laser scanning in interlayer and layer
Thermograde relatively reduces, it is ensured that the Forming Quality of part and precision.
Specifically, the present invention utilizes the first preheating channel 132 and the second preheating channel 133, can be passed through noble gas
Preheating before forming room, contain preheating and in heating process, this structure not only increases noble gas and is entering vacuum
The path of preheating cavity, and by the method for gradually step heating, make the noble gas after heating more stable, not only reduce
Temperature difference between laser scanning region and forming cavity indoor gas, the noble gas after post bake can be persistently to one-tenth simultaneously
Type cylinder and powder cylinder endosexine metal dust preheat, and greatly reduce the interior temperature difference with interlayer of machined layer, reduce thermal stress,
Thus reduce the residual stress in SLM forming process and deformation.
It is different that the present invention is provided with arrangement (interlocking) density in the first preheating channel 132 with the second preheating channel 133
Electrical heating post, the axis of electrical heating post 6 is perpendicular to inert gas flows direction；This arrangement electrical heating post not only possesses heating and makees
With, and the flow-disturbing effect to noble gas can also be played, further increase noble gas in gas heating path 13
Stroke and the time contacted with electrical heating post 6, but also be to noble gas before entering in vacuum preheating cavity 81, first provide
The effect of one buffering so that it is more stable.
The present invention is provided with pressure-detecting device 5 and temperature-detecting device 7 in vacuum preheating cavity 81；Pass through temperature detection
Device 7, monitoring in real time and the situation of temperature in detection vacuum preheating cavity 81, and regulate electrical heating post by temperature control system
The size of electric current on 6, it is achieved the real-time change of the efficiency of heating surface, it is ensured that stablizing of the inert gas temperature in vacuum preheating cavity 81.
The pressure-detecting device 5 air pressure in detection vacuum preheating cavity 81 in real time, it is ensured that keeping of vacuum preheating cavity 81 is stable
Operating pressure；And it is mounted with air relief valve in the cavity wall of vacuum preheating cavity 81, maintain stablizing of heating chamber internal gas pressure further
With safety, stop the potential safety hazard that high temperature and high pressure gas in confined space comes.
The present invention also has additional a set of gas concentration unit, by the unnecessary inertia within vacuum preheating cavity 81 in warm
High temperature and high pressure gas remaining in whole circulation gas circuit after gas and SLM process finishing is collected to store and is continued for processing next time
Continuous use, it is therefore prevented that the wasting of resources.In noble gas removal process, for the sake of security, recovery pipe is provided with a gas
The body chiller (water-cooled glass tubing) noble gas to reclaiming carried out cooling down before entering the storage of gas returnable bottle.
Technical measure is simple and easy to do, cheap, prints the processing essence of profiled member in (SLM) course of processing for 3D
Degree, it is provided that ensure.
Accompanying drawing explanation
Fig. 1 is the structural representation of the protective gas preheating device that the present invention prints for 3D.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Figure 1.The invention discloses a kind of for 3D print protective gas preheating device, including outside protective covers 3,
The vacuum preheating cavity 81 being arranged in outside protective covers 3 and the air inlet 1 being separately positioned on vacuum preheating cavity 81 one end and another
The gas outlet 9 of end；Described vacuum preheating cavity 81 is internal is provided with the identical gas heating path of two line structures 13；Gas is by air inlet
1 enters after gas heating path 13 is heated in entrance vacuum preheating cavity 81, then is entered forming room by gas outlet 9.Described gas
Generally refer to noble gas.
Multiple spaced, electrical heating post 6 of array arrangement it is provided with in gas heating path 13；Described electrical heating post 6
Axis be perpendicular to gas flow direction；Enter after the gas in gas heating path 13 is electrically heated post 6 heating and enter vacuum
In preheating cavity 81.
The middle part of described gas heating path 13 is additionally provided with a dividing plate 131, and gas heating path 13 is split by this dividing plate 131
Become the first preheating channel 132 and the second preheating channel 133；Electrical heating post 6 is distributed in the first preheating channel 132 and the second preheating is logical
On the internal face in road 133；Temperature in second preheating channel 133 is more than the temperature in the first preheating channel 132；First preheating is logical
Road 132 and the second preheating channel 133 provide a step temp. rising and circuitous flow path for gas；Gas is introduced into the first preheating
Passage 132 tentatively preheats, and the gas of preliminary preheating enters the second preheating channel 133 and carries out post bake intensification, completes two
Gas after secondary heat temperature raising enters in vacuum preheating cavity 81, then is entered forming room by gas outlet 9.This structure not only increases
Noble gas is entering the path of vacuum preheating cavity, and by the method for gradually step heating, makes the noble gas after heating
More stable, not only reduce the temperature difference between laser scanning region and forming cavity indoor gas, simultaneously after post bake
Moulding cylinder and powder cylinder endosexine metal dust can persistently be preheated by noble gas, greatly reduce in machined layer and interlayer
Temperature difference, reduce thermal stress, thus reduce the residual stress in SLM forming process and deformation.
It is distributed in the electrical heating post 6 of the second preheating channel 133 to arrange density, more than the electrical heating of the first preheating channel 132
Post 6 is arranged density.This layout not only can make gas be gradually heated up, and can rise to air-flow before entering vacuum preheating cavity 81
Effect to buffering transition.
Diverter 2 it is provided with between air inlet 1 and two-way gas heating path 13；Diverter 2 will enter its interior gas
Each road gas heating path 13 it is respectively fed to after being divided into two-way.
Described protective gas preheating device also includes that one is reclaimed for reclaiming the gas of vacuum preheating cavity 81 internal gas
Bottle 14 and an air feed bottle 15 being used for providing gas to vacuum preheating cavity 81；The import of gas returnable bottle 14 is by with a water
The pipeline connection vacuum preheating cavity 81 of cold glass tubing 12, the seam at vacuum preheating cavity 81 with this pipeline is provided with air relief valve 11；
The gas outlet of gas returnable bottle 14 and air feed bottle 15 is equipped with a valve and connects air inlet 1 by three-way valve.By warm
The High Temperature High Pressure of remaining in whole circulation gas circuit after unnecessary noble gas within middle vacuum preheating cavity 81 and SLM process finishing
Collection and confinement of gases stores and is continuing with for processing next time, it is therefore prevented that the wasting of resources.Water-cooled glass tubing 12 makes noble gas reclaim
During, for the sake of security, noble gas was carried out cooling down before entering the storage of gas returnable bottle.
Described vacuum preheating cavity 81 is the vacuum cavity being encircled into by vacuum glass liner 8；Described vacuum glass liner 8
Asbestos heat-insulation layer 4 it is provided with between outer wall and outside protective covers 3.
Pressure-detecting device 5 and temperature-detecting device 7 are installed in described vacuum preheating cavity 81；Pressure-detecting device 5 is used
Air pressure in detection vacuum preheating cavity 81, temperature-detecting device 7 is for detecting the temperature in vacuum preheating cavity 81；Pre-in vacuum
The gas outlet 9 in hot chamber 81 is provided with the effusion meter 10 for detected gas flow.
The method that gas is preheated by the present invention can be achieved by the steps of:
Noble gas in air feed bottle 15 and/or gas returnable bottle 14, after three-way valve, is entered diverter by air inlet 1
2, after being divided into two-way in diverter 2, it is admitted in the first preheating channel 132 of each road gas heating path 13, by electrical heating
It is carried out preheating for the first time by post 6, completes the preliminary preheating of noble gas；
After noble gas completes tentatively to preheat in the first preheating channel 132, subsequently enter the second preheating channel 133 and carry out
Post bake, makes the inert gas temperature in entrance the second preheating channel 133 more than the temperature when the first preheating channel 132；
Step temp. rising that noble gas is constituted at the first preheating channel 132 and the second preheating channel 133 successively and roundabout stream
Behind dynamic path, enter in vacuum preheating cavity 81, finally entered forming room by gas outlet 9.
In the work process of protective gas preheating device, in pressure-detecting device 5 detects vacuum preheating cavity 81
When air pressure is higher than setting value, unlatching air relief valve 11 is by being higher than the noble gas of setting value in vacuum preheating cavity 81, through water-cooled glass
Send in gas returnable bottle 14 after glass pipe 12 cooling and store；Treat that the air pressure in vacuum preheating cavity 81 recovers to setting value or setting value
Time following, close air relief valve 11.
As it has been described above, just can preferably realize the present invention.
Embodiments of the present invention are also not restricted to the described embodiments, other any spirit without departing from the present invention
With the change made under principle, modify, substitute, combine, simplify, all should be the substitute mode of equivalence, be included in the present invention's
Within protection domain.
Claims (10)
1. the protective gas preheating device printed for 3D, including outside protective covers (3), is arranged in outside protective covers (3)
Vacuum preheating cavity (81) and be separately positioned on air inlet (1) and the gas outlet of the other end of vacuum preheating cavity (81) one end
(9)；It is characterized in that: described vacuum preheating cavity (81) is internal is provided with the identical gas heating path of two line structures (13)；Gas
Entered after gas heating path (13) is heated by air inlet (1) and enter in vacuum preheating cavity (81), then entered by gas outlet (9)
Forming room.
The protective gas preheating device printed for 3D the most according to claim 1, it is characterised in that: at gas heating path
(13) multiple spaced, electrical heating post (6) of array arrangement it is provided with in；The axis of described electrical heating post (6) is perpendicular to gas
Flow direction；Enter after the gas in gas heating path (13) is electrically heated post (6) heating and enter in vacuum preheating cavity (81).
The protective gas preheating device printed for 3D the most according to claim 2, it is characterised in that: the heating of described gas is logical
The middle part in road (13) is additionally provided with a dividing plate (131), and gas heating path (13) is divided into the first preheating channel by this dividing plate (131)
(132) and the second preheating channel (133)；Electrical heating post (6) is distributed in the first preheating channel (132) and the second preheating channel
(133) on internal face；Temperature in second preheating channel (133) is more than the temperature in the first preheating channel (132)；First is pre-
The passage of heat (132) and the second preheating channel (133) provide a step temp. rising and circuitous flow path for gas；
Gas is introduced into the first preheating channel (132) and tentatively preheats, and the gas of preliminary preheating enters the second preheating channel
(133) carry out post bake intensification, complete the gas after post bake heats up and enter in vacuum preheating cavity (81), then by gas outlet
(9) forming room is entered.
The protective gas preheating device printed for 3D the most according to claim 3, it is characterised in that: it is distributed in the second preheating
Electrical heating post (6) the arrangement density of passage (133), more than electrical heating post (6) the arrangement density of the first preheating channel (132).
The protective gas preheating device printed for 3D the most according to claim 1, it is characterised in that: air inlet (1) and two
Diverter (2) it is provided with between road gas heating path (13)；Diverter (2) is distinguished entering after its interior gas is divided into two-way
Send into each road gas heating path (13).
The protective gas preheating device printed for 3D the most according to claim 1, it is characterised in that: described protective gas is pre-
Thermal also includes that one is used for true for the gas returnable bottle (14) and reclaiming vacuum preheating cavity (81) internal gas
Empty preheating cavity (81) provides the air feed bottle (15) of gas；
The import of gas returnable bottle (14) is by pipeline connection vacuum preheating cavity (81) with a water-cooled glass tubing (12), very
Empty preheating cavity (81) is provided with air relief valve (11) with the seam of this pipeline；Gas returnable bottle (14) and the gas outlet of air feed bottle (15)
It is equipped with a valve and connects air inlet (1) by three-way valve.
The protective gas preheating device printed for 3D the most according to claim 1, it is characterised in that: described vacuum preheating cavity
(81) it is the vacuum cavity being encircled into by vacuum glass liner (8)；The outer wall of described vacuum glass liner (8) and outside protective covers
(3) asbestos heat-insulation layer (4) it is provided with between.
8. according to the protective gas preheating device printed for 3D according to any one of claim 1 to 7, it is characterised in that: institute
Pressure-detecting device (5) and temperature-detecting device (7) are installed in stating vacuum preheating cavity (81)；
Pressure-detecting device (5) is used for detecting the air pressure in vacuum preheating cavity (81), and temperature-detecting device (7) is used for detecting vacuum
Temperature in preheating cavity (81)；The gas outlet (9) of vacuum preheating cavity (81) is provided with the effusion meter for detected gas flow
(10)。
9. use the protective gas preheating device printed for 3D according to any one of claim 1 to 8 that gas is preheated
Method, it is characterised in that comprise the steps:
The preliminary preheating step of noble gas:
Noble gas in air feed bottle (15) and/or gas returnable bottle (14), after three-way valve, is entered shunting by air inlet (1)
Device (2), after being divided into two-way, is admitted to first preheating channel (132) on each road gas heating path (13) in diverter (2)
In, electrical heating post (6) carry out preheating for the first time to it, complete the preliminary preheating of noble gas；
The heating steps again of noble gas:
After noble gas completes tentatively to preheat in the first preheating channel (132), subsequently enter the second preheating channel (133) and carry out
Post bake, makes the inert gas temperature in entrance the second preheating channel (133) more than the temperature when the first preheating channel (132)
Degree；
Step temp. rising that noble gas is constituted at the first preheating channel (132) and the second preheating channel (133) successively and roundabout stream
Behind dynamic path, enter in vacuum preheating cavity (81), finally entered forming room by gas outlet (9).
The method that gas is preheated by the protective gas preheating device printed for 3D the most according to claim 9, it is special
Levy and be also to include a real-time recycling step of noble gas:
In the work process of protective gas preheating device, in pressure-detecting device (5) detects vacuum preheating cavity (81)
When air pressure is higher than setting value, opening air relief valve (11) will be higher than the noble gas of setting value, Jing Guoshui in vacuum preheating cavity (81)
Send in gas returnable bottle (14) after cold glass tubing (12) cooling and store；Treat that the air pressure in vacuum preheating cavity (81) recovers to setting
Time below value or setting value, close air relief valve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687420.0A CN106111989B (en) | 2016-08-18 | 2016-08-18 | A kind of protective gas pre-heating mean and device for 3D printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610687420.0A CN106111989B (en) | 2016-08-18 | 2016-08-18 | A kind of protective gas pre-heating mean and device for 3D printing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106111989A true CN106111989A (en) | 2016-11-16 |
| CN106111989B CN106111989B (en) | 2018-06-22 |
Family
ID=57279170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610687420.0A Active CN106111989B (en) | 2016-08-18 | 2016-08-18 | A kind of protective gas pre-heating mean and device for 3D printing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106111989B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110027216A (en) * | 2019-04-04 | 2019-07-19 | 上海航天设备制造总厂有限公司 | A kind of 3D printing device and method improving workpiece shaping quality |
| CN110508367A (en) * | 2019-08-22 | 2019-11-29 | 安徽天瑞塑业有限公司 | Efficient grinding device is used in a kind of preparation of brush filament raw material |
| CN111246953A (en) * | 2017-10-11 | 2020-06-05 | 北京理工大学 | Machining system and machining method for providing variable pressure environment |
| EP3795279A4 (en) * | 2018-05-18 | 2021-12-15 | Ihi Corporation | Three-dimensional shaping device and three-dimensional shaping method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476362A (en) * | 2000-11-27 | 2004-02-18 | �¼��¹�����ѧ | Method and apparatus for creating three-dimensional metal part using high-temp direct laser melting |
| CN202973518U (en) * | 2012-12-25 | 2013-06-05 | 山东商道生物科技有限公司 | Air heater |
| CN203820889U (en) * | 2014-05-09 | 2014-09-10 | 张百成 | SLM (selective laser melting) powder laying and atmosphere circulation protection integrated device |
| CN104357806A (en) * | 2014-10-20 | 2015-02-18 | 西安航空制动科技有限公司 | Preheating device for chemical vapor deposition furnace |
| CN104451603A (en) * | 2014-11-26 | 2015-03-25 | 西安航空制动科技有限公司 | Gas preheating device |
| CN105861849A (en) * | 2016-06-13 | 2016-08-17 | 重庆钢铁(集团)有限责任公司 | Electroslag remelting furnace |
| CN205888086U (en) * | 2016-08-18 | 2017-01-18 | 华南理工大学 | A protective gas preheating device for 3D prints |
-
2016
- 2016-08-18 CN CN201610687420.0A patent/CN106111989B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476362A (en) * | 2000-11-27 | 2004-02-18 | �¼��¹�����ѧ | Method and apparatus for creating three-dimensional metal part using high-temp direct laser melting |
| CN202973518U (en) * | 2012-12-25 | 2013-06-05 | 山东商道生物科技有限公司 | Air heater |
| CN203820889U (en) * | 2014-05-09 | 2014-09-10 | 张百成 | SLM (selective laser melting) powder laying and atmosphere circulation protection integrated device |
| CN104357806A (en) * | 2014-10-20 | 2015-02-18 | 西安航空制动科技有限公司 | Preheating device for chemical vapor deposition furnace |
| CN104451603A (en) * | 2014-11-26 | 2015-03-25 | 西安航空制动科技有限公司 | Gas preheating device |
| CN105861849A (en) * | 2016-06-13 | 2016-08-17 | 重庆钢铁(集团)有限责任公司 | Electroslag remelting furnace |
| CN205888086U (en) * | 2016-08-18 | 2017-01-18 | 华南理工大学 | A protective gas preheating device for 3D prints |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111246953A (en) * | 2017-10-11 | 2020-06-05 | 北京理工大学 | Machining system and machining method for providing variable pressure environment |
| EP3795279A4 (en) * | 2018-05-18 | 2021-12-15 | Ihi Corporation | Three-dimensional shaping device and three-dimensional shaping method |
| CN110027216A (en) * | 2019-04-04 | 2019-07-19 | 上海航天设备制造总厂有限公司 | A kind of 3D printing device and method improving workpiece shaping quality |
| CN110027216B (en) * | 2019-04-04 | 2021-06-11 | 上海航天设备制造总厂有限公司 | 3D printing device and method for improving workpiece forming quality |
| CN110508367A (en) * | 2019-08-22 | 2019-11-29 | 安徽天瑞塑业有限公司 | Efficient grinding device is used in a kind of preparation of brush filament raw material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106111989B (en) | 2018-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205888086U (en) | A protective gas preheating device for 3D prints | |
| CN106111989A (en) | A kind of protective gas pre-heating mean printed for 3D and device | |
| CN104959606B (en) | Partial temperature control system for metal material 3D printing | |
| CN103737933A (en) | Manufacturing equipment of laser additive | |
| CN109466060A (en) | A kind of high-temperature laser constituency sintering frame structure of independent temperature control | |
| CN107199244A (en) | Continuously, online, constant temperature roll heating temperature control device | |
| CN108215100A (en) | A kind of fast temperature regulating device of temperature control injection mold | |
| CN106111986A (en) | A kind of laser 3D printing device | |
| CN105197986B (en) | A kind of method utilizing air stream quickly to prepare Plumbum preparatium | |
| CN205673604U (en) | 3D print system and ejecting device thereof | |
| CN108731515A (en) | A kind of inert gas for 3D printing cools device | |
| CN115055699A (en) | Particle reinforced aluminum-based composite material molten drop composite electric arc additive manufacturing device and method | |
| CN206598542U (en) | A kind of high temperature resistant FDM print head structures | |
| CN104772462B (en) | A kind of printing head device based on lf | |
| CN108115239B (en) | Brazing furnace using gas as medium for heating/cooling and working method thereof | |
| CN206124217U (en) | 3D printer melt extruding means of speed adjusting temperature soon | |
| CN204488059U (en) | A kind of 3D printer port of printer with heat dissipation wind channel | |
| CN106238731A (en) | A kind of hybrid metal 3D three-dimensional printing technology | |
| CN215766457U (en) | Vacuum sintering furnace | |
| CN106006563B (en) | A kind of ion-conductive membranes oxygenerator with energy recovery function | |
| CN203508973U (en) | Horizontal continuous-casting integrated furnace | |
| TW200824878A (en) | Heat insulating mold, mold component, molding machine, and method for manufacturing the heat insulating mold | |
| CN203610619U (en) | Aluminum melt degassing flowing groove | |
| CN103264163B (en) | Metal powder injection molding vacuum degreasing fritting furnace windstream device | |
| CN204504221U (en) | A kind of printing head device based on lf |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |