CN110238398A - A kind of lens protection device of SLM type metal 3D printer - Google Patents
A kind of lens protection device of SLM type metal 3D printer Download PDFInfo
- Publication number
- CN110238398A CN110238398A CN201910584793.9A CN201910584793A CN110238398A CN 110238398 A CN110238398 A CN 110238398A CN 201910584793 A CN201910584793 A CN 201910584793A CN 110238398 A CN110238398 A CN 110238398A
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- lens
- molding room
- air inlet
- guide cylinder
- protection device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
- B22F10/20—Direct sintering or melting
- B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/003—Apparatus, e.g. furnaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
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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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
Abstract
The invention discloses a kind of lens protection devices of SLM type metal 3D printer, including lens protection mechanism, admission gear and exhaust gear；The lens protection mechanism includes lens fixing seat, lens and separating mechanism；The separating mechanism includes the top air inlet being arranged on molding room's top plate, the setting guide cylinder of side and the gas delivery channels for air inlet and guide cylinder at the top of being connected under a lens, wherein, the top air inlet is connect with external top air inlet pipe, for the inert gas in the top air inlet pipe to be passed into gas delivery channels；The guide cylinder is mounted on molding room's top plate, and the guide cylinder and the lens are concentric；The lens are located in the guide cylinder.The black smoke that lens protection device of the invention generates when can be to avoid 3D printing is adhered on lens, to eliminate the process for manually clearing up lens, this can not only use manpower and material resources sparingly, but also can protect lens.
Description
Technical field
The present invention relates to a kind of 3D printers, and in particular to a kind of lens protection device of SLM type metal 3D printer.
Background technique
3D printing technique manufactures entity component by the way that material is successively accumulated in together, relative to classical production process,
3D printing technique is with short production cycle, is not necessarily to cutter, and mold can process complex-shaped part.(selective laser melts SLM
Change) technology makes its fast melt using the laser beam irradiation metal powder of high-energy and cooled and solidified forms, the part processed
Close to 100%, metal 3D printing technique has in fields such as automobile, aerospace, medical treatment, military projects widely answers compactness
With.
At work, laser scanning metal powder is the carbon contained in metal powder, low for existing metal 3D printer
Melting point alloying element and impurity element burning, gasification can generate black smoke.It can be generated if being repeatedly used for a long of metal powder
More black smokes.The presence of black smoke can pollute lens, especially low-velocity scanning when, laser energy input is big, produces
Raw black smoke amount is also big, and after working long hours, the surface of lens will adhere to a large amount of black smoke, this will lead to laser light mirror
Power attenuation is serious when piece, and the energy of laser is largely absorbed by eyeglass, so as to cause eyeglass fast heating, hot or even quick-fried
It splits, underpower when black smoke also results in laser light incident to metal powder to the pollution of lens, so that metal powder melts not
Sufficiently.Another harm of black smoke is: part black smoke descends slowly and lightly to unprocessed metal powder surface, mixes with powder,
To pollute metal powder, and then influence the quality of production of laser processing.
In order to guarantee the normal use of lens, current metal 3D printer will carry out hand to lens at regular intervals
Work cleans up the black smoke adsorbed above, and in scale removal process, the process for dismounting lens back and forth is very complicated, and labor intensive object
Power, and if forget to clear up lens for a long time, lens may be caused and the serious consequence such as burst.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of lens of SLM type metal 3D printer guarantors
Protection unit, the black smoke that the lens protection device generates when can be to avoid 3D printing are adhered on lens, to eliminate artificial
The process of cleaning lens manually, this can not only use manpower and material resources sparingly, but also can avoid the occurrence of because forgetting to clear up lens
And situations such as causing lens to cause lens to burst because being stained with a large amount of black smokes during 3D printing.
The technical solution that the present invention solves above-mentioned technical problem is:
A kind of lens protection device of SLM type metal 3D printer, including the lens protection being arranged in molding room's top plate
Mechanism, for the admission gear for being passed through inert gas inside molding room and the exhaust that the black smoke generated in molding room is discharged
Mechanism, wherein the exhaust gear and the admission gear are arranged inside the molding room, and are mounted on molding room's bottom plate
On；
The lens protection mechanism includes the lens fixing seat being arranged on molding room's top plate, is arranged in lens fixing seat
Lens and separating mechanism of the black smoke far from lens that generates of while promoting 3D printing, wherein the separating mechanism includes setting
In top air inlet, the guide cylinder that is arranged in below the lens and for air inlet at the top of being connected on molding room's top plate
The gas delivery channels of mouth and the guide cylinder, wherein
The top air inlet is connect with the connector of external top air inlet pipe, for will be in the top air inlet pipe
Inert gas is passed into gas delivery channels；The guide cylinder is mounted on molding room's top plate, and the guide cylinder and institute
It is concentric to state lens；The lens are located in the guide cylinder.
Preferably, the admission gear includes the airscoop shroud being arranged in inside molding room and is arranged in airscoop shroud lower end
Air induction conduit, wherein be provided with multiple gas holes, the multiple gas hole on the end face of exhaust gear in the airscoop shroud
Length direction along the airscoop shroud is evenly distributed；Each gas hole is connected to air induction conduit；Molding room's bottom plate exists
It is provided with mounting hole at the position contacted with the air induction conduit, is arranged between the inner wall of the mounting hole and the air induction conduit
Rubber sleeve；The rubber sleeve is mounted on the upper end of the mounting hole；The lower end of the mounting hole is connected to bottom inflow pipe, institute
It states molding room's bottom plate and is provided with fixation hole for fixing the bottom inflow pipe at the position contacted with the bottom inflow pipe,
The fixation hole is connected to and concentric with the mounting hole, and the lower end of the rubber sleeve is in the position contacted with the bottom inflow pipe
The place of setting is provided with sealing, and the outer diameter of the sealing is equal with the internal diameter of the fixation hole, and the diameter of the fixation hole is greater than
The diameter of the mounting hole.
Preferably, the both ends of the airscoop shroud are provided with the height adjustment mechanism for adjusting the airscoop shroud height, described
Height adjustment mechanism includes the sliding seat and bolt being arranged at left and right sides of the airscoop shroud, wherein is set on the sliding seat
It is equipped with pilot hole, the bolt is fixed on molding room's bottom plate after passing through pilot hole straight down, also sets up on the bolt
There is nut, the upper and lower ends of the sliding seat are arranged in the nut.
Preferably, the exhaust gear includes hood and the exhaust manifolds that the hood lower end is arranged in, wherein
The hood is arranged on molding room's bottom plate, and gas hole of the air entry of the hood towards the airscoop shroud；Institute
The bottom for stating hood is provided with exhaust outlet, and the exhaust outlet is connect with the exhaust manifolds, molding room's bottom plate with institute
It states and is provided with escape port at the position of exhaust manifolds contact；The exhaust manifolds are mounted in the escape port.
Preferably, the hood and airscoop shroud are located at the two sides of the moulding cylinder of the molding room.
Preferably, the lens protection mechanism further includes the lens protective cover being arranged in below the lens, the lens
Protective cover is mounted on molding room's top plate, and is located inside the molding room；The lens are located at the lens protective cover
Inside, the lens protective cover are provided with intake interface in the position contacted with the top air inlet；The lens protective cover exists
The corresponding position of the lens is provided with opening；The guide cylinder is mounted on the lens protective cover；The lens are protected
The inner cavity for being connected to the top air inlet and the guide cylinder is provided in shield, it is logical that the inner cavity constitutes the gas conveying
Road.
Preferably, the intake interface of the lens protective cover is between the top air inlet, the lens protective cover
Opening and molding room's top plate between be provided with sealing ring.
Preferably, the lens fixing seat includes lens mount and the compression for being fixed on lens on the lens mount
Component, wherein the lens mount is mounted on molding room's top plate, is provided on the lens mount for installing the lens
Mounting groove；It is described to hold down assembly including lens pressing plate and housing screw, wherein the housing screw pacifies the lens pressing plate
On the lens mount, the lens are fixed in the mounting groove by the lens pressing plate.
Preferably, the exhaust gear and the power mechanism of admission gear are air blower, the air inlet of the air blower with
The exhaust manifolds connection, gas outlet are connected to the top air inlet pipe and the bottom inflow pipe, the air blower and the row
The filter for filtering out black smoke is provided between airway.
It preferably, further include control device, the control device includes two solenoid valves, and one of solenoid valve is for controlling
The air inflow of inert gas in molding room processed, another solenoid valve are used to control the discharge rate of the inert gas in molding room.
The working principle of the lens protection device of SLM type metal 3D printer of the invention is
Before work, admission gear is first passed through to being passed through inert gas inside molding room, and by exhaust gear by molding room
In air discharge so that entire metal 3D printing processing carries out in the environment of an anaerobic.
When work, laser scanning metal powder, cause the carbon contained in metal powder, low-melting alloy element and
Impurity element burning gasifies and generates black smoke, and the black smoke of generation can be swum in inside molding room, at this moment, not due to admission gear
Stop being passed through inert gas to the inside of molding room, and then ceaselessly the air inside molding room is discharged for exhaust gear, so that molding
Most black smokes in room can be discharged to outside molding room by exhaust gear, but still have sub-fraction black smoke upward
It floats at lens, at this moment, inert gas is passed through by the top air inlet on molding room's top plate, which passes through gas
Body transfer passage enters in guide cylinder, since the guide cylinder is located at the lower end of lens, and is connected with lens, therefore enter
Inert gas inside guide cylinder can only be moved downward along the inner cavity of guide cylinder, thus will go into black smoke in guide cylinder to
Outside lower blowout guide cylinder, and then the black smoke is avoided to be adhered on lens.
The present invention have compared with prior art it is below the utility model has the advantages that
1, lens protection device of the invention is passed through inert gas to gas delivery channels by top air inlet pipe, is passed through
Inert gas is entered in guide cylinder by gas delivery channels, since the lower section of the lens is arranged in the guide cylinder, and
The lens are located in the inner cavity of the guide cylinder, and therefore, the inert gas entered in guide cylinder will be along guide cylinder
Axial direction sprays downwards, to will go into outside the black smoke blowout guide cylinder of guide cylinder, and then smaller black smoke is contacted with lens
Probability.
2, the black smoke that lens protection device of the invention can generate to avoid molding room is adhered on lens, so that work people
Member does not need periodic cleaning lens, to save a large amount of manpower and material resources.But also it can avoid the occurrence of because forgetting that cleaning is saturating
Mirror and situations such as cause lens to cause lens to burst because being stained with a large amount of black smokes during 3D printing.
3, pass through air inlet by the way that exhaust gear and admission gear are arranged in molding room in lens protection device of the invention
Mechanism is arranged the inert gas in molding room together with black smoke by exhaust gear to being passed through inert gas inside molding room
It is adhered on lens to the black smoke that outside molding room, can further avoid generating in molding room so out, to extend SLM type gold
Belong to the service life of 3D printer.
Detailed description of the invention
Fig. 1-Fig. 3 is the structure of the specific embodiment of the lens protection device of SLM type metal 3D printer of the invention
Schematic diagram, wherein Fig. 1 is schematic perspective view, and Fig. 2 is the schematic perspective view of internal structure, and Fig. 3 is cross-sectional view.
Fig. 4 is the schematic perspective view of lens protection mechanism.
Fig. 5 is the cross-sectional view of lens protection mechanism.
Fig. 6 is the schematic perspective view of admission gear.
Fig. 7 is the cross-sectional view of admission gear.
Fig. 8 is the cross-sectional view of exhaust gear.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Referring to Fig. 1-Fig. 8, the lens protection device of SLM type metal 3D printer of the invention includes setting in molding ceiling
Lens protection mechanism 1 in plate 4, for being passed through the admission gear 5 of inert gas inside molding room and will be produced in molding room
The exhaust gear 6 of raw black smoke discharge, wherein the exhaust gear 6 and the admission gear 5 are arranged in the molding room
Portion, and be mounted on molding room's bottom plate 7.
Referring to Fig. 1-Fig. 8, the lens protection mechanism 1 includes the lens fixing seat being arranged on molding room's top plate 4, setting
In separating mechanism of the black smoke far from lens 8 that the lens 8 in lens fixing seat and while promoting 3D printing generate, wherein described
The guide cylinder 1- that separating mechanism includes the top air inlet being arranged on molding room's top plate 4, is arranged in below the lens 8
4 and for be connected to top air inlet and the guide cylinder 1-4 gas delivery channels 1-6, wherein the top air inlet and
The connector connection of external top air inlet pipe 3, for the inert gas in the top air inlet pipe 3 to be passed into gas conveying
In the 1-6 of channel；The guide cylinder 1-4 is mounted on molding room's top plate 4, and guide cylinder 1-4 and the lens 8 are coaxial
The heart；The lens 8 are located in the guide cylinder 1-4.
Referring to Fig. 1-Fig. 8, the admission gear 5 include be arranged in airscoop shroud 5-1 inside molding room and setting into
The air induction conduit 5-6 of the lower end gas hood 5-1, wherein be provided on the end face of exhaust gear 6 in the airscoop shroud 5-1 multiple
Gas hole 5-4, the multiple gas hole 5-4 is evenly distributed along the length direction of the airscoop shroud 5-1；Each gas hole 5-4
It is connected to air induction conduit 5-6；Molding room's bottom plate 7 is provided with mounting hole in the position contacted with the air induction conduit 5-6,
Rubber sleeve 5-7 is set between the inner wall of the mounting hole and the air induction conduit 5-6；The rubber sleeve 5-7 is mounted on described
The upper end of mounting hole；The lower end of the mounting hole is connected to bottom inflow pipe 5-8, molding room's bottom plate 7 with the bottom
The fixation hole for fixing bottom inflow pipe 5-8, the fixation hole and the peace are provided at the position of air inlet pipe 5-8 contact
Fill hole connection and it is concentric, the lower end of the rubber sleeve 5-7 is provided with close at the position contacted with the bottom inflow pipe 5-8
The outer diameter of envelope portion 5-71, the sealing 5-71 are equal with the internal diameter of the fixation hole, and the diameter of the fixation hole is greater than described
The diameter of mounting hole.When work, inert gas (such as argon gas) is sent to by extraneous inlet duct by bottom inflow pipe 5-8
In airscoop shroud 5-1, and blown out by gas hole 5-4.In the process, due to being set between air induction conduit 5-6 and the mounting hole
It is equipped with rubber sleeve 5-7, can prevent inert gas from leaking in this way, and since the bottom of rubber sleeve 5-7 is provided with sealing 5-
71, the outer diameter of the sealing 5-71 is equal with the internal diameter of the fixation hole, and the diameter of the fixation hole is greater than the mounting hole
Diameter, therefore, when installing rubber sleeve 5-7, can by rubber sleeve 5-7 from fixation hole be inserted into, the lower end the rubber sleeve 5-7
Sealing 5-71 can not only play the role of that bottom inflow pipe 5-8 is limited and sealed, but also in the air inlet machine
During structure 5 does vertical motion, the rubber sleeve 5-7 will not occur vertically movable because of frictional force.In addition, the air inlet
It can link together by welding between conduit 5-6 and airscoop shroud 5-1.
Referring to Fig. 1-Fig. 8, the both ends of the airscoop shroud 5-1 are provided with the height of the height for adjusting airscoop shroud 5-1
Regulating mechanism, the height adjustment mechanism include the sliding seat 5-3 and bolt 5- being arranged at left and right sides of the airscoop shroud 5-1
2, wherein be provided with pilot hole on the sliding seat 5-3, the bolt 5-2 pass through straight down be fixed on after pilot hole it is described
On molding room's bottom plate 7, nut 5-5 is additionally provided on bolt 5-2, the upper and lower of the sliding seat 5-3 is arranged in the nut 5-5
Both ends.In this way, the height of airscoop shroud 5-1 is adjusted by turning the nut 5-5 positioned at the two sides sliding seat 5-3 or more, thus
It will adjust in airscoop shroud 5-1 to optimum position.
Referring to Fig. 1-Fig. 8, the exhaust gear 6 includes hood 6-1 and the row that the lower end the hood 6-1 is arranged in
Airway 11, wherein the hood 6-1 is arranged on molding room's bottom plate 7, and the face air entry 6-2 of hood 6-1
To the gas hole 5-4 of the airscoop shroud 5-1；The bottom of the hood 6-1 is provided with exhaust outlet, the exhaust outlet and the row
Airway 11 connects, and molding room's bottom plate 7 is provided with escape port at the position contacted with the exhaust manifolds 11；The row
Airway 11 is mounted in the escape port.In this way, will be inside molding room by external exhaust apparatus (such as negative pressure device)
The black smoke of production is discharged to outside molding room by exhaust manifolds 11, can thus be adhered to avoid the black smoke generated in molding room
On lens 8 and the part of other driving mechanisms, to extend the service life of SLM type metal 3D printer of the invention.
Referring to Fig. 1-Fig. 8, the hood 6-1 and airscoop shroud 5-1 are located at the two sides of the moulding cylinder of the molding room.This
Sample, in the work of SLM type metal 3D printer, the impurity in metal powder in moulding cylinder 10 burns production under the irradiation of laser
Raw black smoke is directly driven in the air entry 6-2 of hood 6-1 by the inert gas that the air inlet 5-4 of airscoop shroud 5-1 is blown out, and
It is discharged to outside molding room by exhaust manifolds 11, the content for forming indoor black smoke can be greatly reduced in this way, thus further
Reduce the probability that black smoke is adhered to lens 8.
Referring to Fig. 1-Fig. 8, the surrounding of the air inlet 6-2 of the hood 6-1 is provided with guide plate 6-3, the guide plate
Towards the inner inclination of airscoop shroud 5-1, this is convenient for for the inert gas in molding room being inhaled into hood 6-1 6-3.
Referring to Fig. 1-Fig. 8, the exhaust outlet of the hood 6-1 is provided in the position contacted with molding room's bottom plate 7
Sealing ring 9, can prevent in this way the gas that be discharged to outside molding room or black smoke by the exhaust outlet of hood 6-1 at
Air gap leakage between type room bottom plate 7 is returned inside molding room.
Referring to Fig. 1-Fig. 8, the lens protection mechanism 1 further includes the lens protective cover 1- being arranged in below the lens 8
5, the lens protective cover 1-5 is mounted on molding room's top plate 4, and is located inside the molding room；The lens 8 are located at
Inside the lens protective cover 1-5, which is provided with air inlet at the position contacted with the top air inlet
Interface；The lens protective cover 1-5 is provided with opening in the corresponding position with the lens 8；The guide cylinder 1-4 passes through spiral shell
The mode of line connection is mounted on the lens protective cover 1-5；Be provided in the lens protective cover 1-5 connection top into
The inner cavity of port and the guide cylinder 1-4, the inner cavity constitute the gas delivery channels 1-6.
Referring to Fig. 1-Fig. 8, the intake interface of the lens protective cover 1-5 between the top air inlet, it is described
Sealing ring 9 is provided between the opening of mirror protective cover 1-5 and molding room's top plate 4.
Referring to Fig. 1-Fig. 8, the lens fixing seat includes lens mount 1-1 and for lens 8 to be fixed on the lens
Holding down assembly on seat 1-1, the lens mount 1-1 is mounted on molding room's top plate 4, is arranged on lens mount 1-1 useful
In the mounting groove for installing the lens 8；It is described to hold down assembly including lens pressing plate 1-2 and housing screw 1-3, wherein described
The lens pressing plate 1-2 is mounted on the lens mount 1-1 by housing screw 1-3, and the lens 8 pass through the lens pressing plate 1-
2 are fixed in the mounting groove.
Referring to Fig. 1-Fig. 8, the lens 8 are equal at the position contacted with the lens pressing plate 1-2 and the lens mount 1-1
It is provided with sealing ring 9.
Referring to Fig. 1-Fig. 8, the power mechanism of the exhaust gear 6 and admission gear 5 is air blower, the air blower into
Port is connected to the exhaust manifolds 11, and gas outlet is connected to the top air inlet pipe 3 and the bottom inflow pipe 5-8, the drum
It is provided with filter between blower and the exhaust manifolds 11, for sponging the black smoke taken out of by air-flow, thus purification gas.
It is sucked out in this way, the air blower will form indoor inert gas and black smoke by exhaust manifolds 11, and by being arranged in air blast
Filter in machine is filtered the inert gas and black smoke, and filtered inert gas is then being passed through top air inlet pipe
3 and bottom inflow pipe 5-8 sends back in molding room, and allowing for the inert gas in molding room in this way can be recycled, from
And save cost.
Referring to Fig. 1-Fig. 8, lens protection device of the invention further includes control device, and the control device includes two electricity
Magnet valve 2, the inspiratory capacity that one of solenoid valve 2 is used to control control air blower control the capacity of exhaust gear 6 with this, separately
The gas output that one solenoid valve 2 is used to control air blower controls the air inflow of admission gear 5 and top air inlet pipe 3 with this.
Referring to Fig. 1-Fig. 8, the working principle of the lens protection device of SLM type metal 3D printer of the invention is
Before work, admission gear 5 is first passed through to being passed through inert gas inside molding room, and will form by exhaust gear 6
Air discharge in room, so that entire metal 3D printing processing carries out in the environment of an anaerobic.
When work, laser scanning metal powder, cause the carbon contained in metal powder, low-melting alloy element and
Impurity element burning gasifies and generates black smoke, and the black smoke of generation can be swum in inside molding room, at this moment, not due to admission gear 5
Stop being passed through inert gas to the inside of molding room, and then ceaselessly the inert gas inside molding room is discharged for exhaust gear 6, so that
Most black smokes in molding room can be discharged to outside molding room with inert gas by exhaust gear 6, but still be had one small
Part black smoke can float up at lens 8, at this moment, be passed through inert gas by the top air inlet on molding room's top plate 4,
The inert gas is entered in guide cylinder 1-4 by gas delivery channels 1-6, since the guide cylinder 1-4 is located under lens 8
End, and be connected with lens 8, therefore entering the inert gas inside guide cylinder 1-4 can only be downward along the inner cavity of guide cylinder 1-4
Movement, so that the black smoke that will go into guide cylinder 1-4 is blown out downwards outside guide cylinder 1-4, and then avoids the black smoke from being adhered to
On mirror 8.
Above-mentioned is the preferable embodiment of the present invention, but embodiments of the present invention are not limited by the foregoing content,
His any change made without departing from the spirit and principles of the present invention, modification, substitution, block close, are simplified, should be
The substitute mode of effect, is included within the scope of the present invention.
Claims (10)
1. a kind of lens protection device of SLM type metal 3D printer, which is characterized in that including being arranged in molding room's top plate
Lens protection mechanism, for being arranged to the admission gear for being passed through inert gas inside molding room and by the black smoke generated in molding room
Exhaust gear out, wherein the exhaust gear and the admission gear are arranged inside the molding room, and are mounted on molding
On the bottom plate of room；
The lens protection mechanism include the lens fixing seat being arranged on molding room's top plate, be arranged in it is saturating in lens fixing seat
Separating mechanism of the black smoke far from lens that mirror and while promoting 3D printing generate, wherein the separating mechanism includes being arranged in institute
State the top air inlet on molding room's top plate, the guide cylinder being arranged in below the lens and for be connected at the top of air inlet with
The gas delivery channels of the guide cylinder, wherein
The top air inlet is connected to external top air inlet pipe, for the inert gas in the top air inlet pipe to be passed through
Into gas delivery channels；The guide cylinder is mounted on molding room's top plate, and the guide cylinder and the lens are concentric；
The lens are located in the guide cylinder.
2. the lens protection device of SLM type metal 3D printer according to claim 1, which is characterized in that the air inlet
Mechanism includes the airscoop shroud being arranged in inside molding room and the air induction conduit that airscoop shroud lower end is arranged in, wherein the air inlet
Be provided with multiple gas holes on the end face of exhaust gear in cover, the multiple gas hole along the airscoop shroud length side
To evenly distributed；Each gas hole is connected to air induction conduit；Molding room's bottom plate is in the position contacted with the air induction conduit
The place of setting is provided with mounting hole, and rubber sleeve is arranged between the inner wall of the mounting hole and the air induction conduit；The rubber sleeve peace
Mounted in the upper end of the mounting hole；The lower end of the mounting hole is connected to bottom inflow pipe, molding room's bottom plate with it is described
The fixation hole for fixing the bottom inflow pipe, the fixation hole and the installation are provided at the position of bottom inflow pipe contact
Hole connection and it is concentric, the lower end of the rubber sleeve is provided with sealing at the position contacted with the bottom inflow pipe, institute
The outer diameter for stating sealing is equal with the internal diameter of the fixation hole, and the diameter of the fixation hole is greater than the diameter of the mounting hole.
3. the lens protection device of SLM type metal 3D printer according to claim 2, which is characterized in that the air inlet
The both ends of cover are provided with the height adjustment mechanism for adjusting the airscoop shroud height, and the height adjustment mechanism includes being arranged in institute
State the sliding seat and bolt at left and right sides of airscoop shroud, wherein be provided with pilot hole on the sliding seat, the bolt vertically to
Under be fixed on after pilot hole on molding room's bottom plate, be additionally provided with nut on the bolt, the nut is arranged described
The upper and lower ends of sliding seat.
4. the lens protection device of SLM type metal 3D printer according to claim 3, which is characterized in that the exhaust
Mechanism includes hood and the exhaust manifolds that the hood lower end is arranged in, wherein hood setting it is described at
On the bottom plate of type room, and gas hole of the air entry of the hood towards the airscoop shroud；The bottom of the hood is provided with row
Port, the exhaust outlet are connect with the exhaust manifolds, and molding room's bottom plate is at the position contacted with the exhaust manifolds
It is provided with escape port；The exhaust manifolds are mounted in the escape port.
5. the lens protection device of SLM type metal 3D printer according to claim 4, which is characterized in that the exhaust
Cover and airscoop shroud are located at the two sides of the moulding cylinder of the molding room.
6. the lens protection device of SLM type metal 3D printer according to claim 1, which is characterized in that the lens
Protection mechanism further includes the lens protective cover being arranged in below the lens, and the lens protective cover is mounted on the molding ceiling
On plate, and it is located inside the molding room；The lens are located inside the lens protective cover, the lens protective cover with it is described
The position of top air inlet contact is provided with intake interface；The lens protective cover is arranged with the corresponding position of the lens
There is opening；The guide cylinder is mounted on the lens protective cover；Be provided in the lens protective cover connection top into
The inner cavity of port and the guide cylinder, the inner cavity constitute the gas delivery channels.
7. the lens protection device of SLM type metal 3D printer according to claim 6, which is characterized in that the lens
The intake interface of protective cover between the top air inlet, the opening of the lens protective cover and molding room's top plate it
Between be provided with sealing ring.
8. the lens protection device of SLM type metal 3D printer according to claim 7, which is characterized in that the lens
Fixing seat includes lens mount and for lens to be fixed on holding down assembly on the lens mount, wherein the lens mount peace
On molding room's top plate, the mounting groove for installing the lens is provided on the lens mount；The packet that holds down assembly
Include lens pressing plate and housing screw, wherein the lens pressing plate is mounted on the lens mount by the housing screw, described
Lens are fixed in the mounting groove by the lens pressing plate.
9. the lens protection device of SLM type metal 3D printer according to claim 5, which is characterized in that the exhaust
The power mechanism of mechanism and admission gear is air blower, and the air inlet of the air blower is connected to the exhaust manifolds, gas outlet
It is connected to the top air inlet pipe and the bottom inflow pipe, is additionally provided between the air blower and the exhaust manifolds for mistake
Filter the filter of black smoke.
10. the lens protection device of SLM type metal 3D printer according to claim 1, which is characterized in that further include control
Device processed, the control device include two solenoid valves, and one of solenoid valve is used to control the inert gas in molding room
Air inflow, another solenoid valve are used to control the discharge rate of the inert gas in molding room.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113020630A (en) * | 2021-03-04 | 2021-06-25 | 佛山市佛威精密机器有限公司 | Lens protection equipment of metal 3D printer |
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