CN108115131A - For the active blowback cleaning equipment of selective laser fusing manufacture - Google Patents

Abstract

The invention discloses a kind of active blowback cleaning equipments for selective laser fusing manufacture, including cabinet, and it is arranged at the filter device inside cabinet, the filter device is connected between the air inlet and return air inlet for meeting SLM device molding room, the filter device includes at least one filter core, the filter core is internally provided with the back-blowing device blown from inside to outside, the air inlet of the back-blowing device is communicated with the gas tank to its supplying inert gas, gas outlet passes through the diffusion mouth and turned on outside that are arranged on cabinet, selection gas is provided between the diffusion mouth and return air inlet to enter return air inlet or be emitted into the valve group of air by diffusion mouth, back-blowing device can carry out blowback to the soot dust granule object on filter core, to remove the particle blocked thereon, it avoids shutting down the replacement for carrying out filter core in print procedure of SLM device.

Description

For the active blowback cleaning equipment of selective laser fusing manufacture

Technical field

It is clear more particularly to a kind of active blowback for selective laser fusing manufacture the present invention relates to material increasing field Wash equipment.

Background technology

Selective laser melting SLM（Selective Laser Melting）Technology is a kind of side of metal increasing material manufacturing Method.The rapidoprint that SLM technologies use is metal powder that grain size is about 15 μm -50 μm.In process, laser Laser is sent, is irradiated to after optical system is handled in processing plane, under control system control, laser is according to being directed into system In the contour curve that is calculated of stl file, the powder bed that metal powder is paved into is scanned, metal powder is made to melt to be formed into Product.

Since absolute tightness state is not achieved in SLM device molding room, during laser scanning powder bed, under laser irradiation Metal powder be easy to contact with the oxygen carried in oxygen micro in SLM device molding room, powder under the high temperature conditions, occur It aoxidizes to generate flue dust.Due to the factors such as the percussion of laser energy and shaping indoor air flow disturbance, substantial amounts of flue dust It is attached on powder bed, directly affects absorption of the powder bed surface to laser energy, the final quality for influencing metal forming part.

At present in SLM metal material increasing fields, used dedusting and purifying device be all directly using filter core into Row purification filtering or using filtration grade not wait cartridge combination progress purification filtering.For example, Authorization Notice No. is A kind of classified filtering device for 3D printing equipment is disclosed in the patent document of CN201610482667.9.Its technical solution In, which is made of cyclone type particle separator and filter core, and filter core is equipped with differential pressure pickup.When filter core due to It blocks after pressure is caused to rise to setting value, equipment can carry out automatic alarm, need to replace filter core in time after alarm, ensure 3D The normal operation of printing device.

The shortcomings that classified filtering device, is that the reduced service life of filter core is, it is necessary to frequently replace.If processed Filter core, which reaches the service life of operating limit or filter core, in journey cannot meet time of time processing part, it is necessary to process Halfway by 3D printing equipment downtime, equipment is reopened after replacing filter core.It so both loses time, increases manufacture cost, and not It can guarantee that equipment is worked continuously, so as to influence molding effect.

The content of the invention

It is an object of the invention to provide a kind of active blowback cleaning equipments for selective laser fusing manufacture, can be right Soot dust granule object on filter core carries out blowback, to remove the particle blocked thereon, avoids stopping in print procedure of SLM device Machine carries out the replacement of filter core.

To achieve the above object, the present invention provides following technical solutions：

A kind of active blowback cleaning equipment for selective laser fusing manufacture including cabinet and is arranged inside cabinet Filter device, the filter device are connected between the air inlet and return air inlet for meeting SLM device molding room, and the filter device includes There is at least one filter core, the filter core is internally provided with the back-blowing device blown from inside to outside, the air inlet of the back-blowing device Mouth is communicated with the gas tank to its supplying inert gas, gas outlet by the diffusion mouth and turned on outside that are arranged on cabinet, described Selection gas is provided between diffusion mouth and return air inlet to enter return air inlet or be emitted into the valve group of air by diffusion mouth.

Using above technical scheme, filter core is filtered the gas introduced in air inlet in the case of normal work, And clean gas is exported from return air inlet to SLM device molding room.In use for some time, filter opening thereon can be sent out filter core It is raw to block, when the percentage that the filter opening of blocking accounts for whole filter opening quantity of entire filter core reaches the upper limit, the pressure difference report on filter core Alert device can send alarm sounds operator and replace filter core, at this point, the print job in SLM device not yet terminates, start blowback dress It puts and blows filter core from the inside to the outside in filter core, the partial particulate for blocking filter opening is blown off, so that filter core temporarily meets job requirement, Until the print job in SLM device terminates the pickup that can open the cabin, filter element replacing is carried out at this time.Such mode is particularly suitable for beating Filter core reaches the situation of SC service ceiling during print, replaces filter core at this time, is necessarily required to cut off SLM device, replaces after filter core more Deoxygenation again is needed, one comes one toward the work efficiency that can influence SLM device, and after the completion of printing, and SLM device needs are opened into Type room hatch door is to take out forming part, at this point, being carried out at the same time filter element replacing, it is possible to reduce midway, which is shut down, to be replaced caused by filter core The waste for the inert gas that time wastes and additional increased deoxygenation work is consumed.

Further, the filter device includes coarse filtration part and refined filtration part, passing through refined filtration air inlet pipe between two parts Conducting, the coarse filtration part includes being connected to the cyclone dust collectors of the air inlet and connection is arranged at cyclone dust collectors bottom Aggregate tank, the filter core is arranged at refined filtration part.

Using above technical scheme, in the gas for entering filter device from air inlet, not only include the flue dust aoxidized, It is also possible to be mingled with substantial amounts of metal powder due to gas disturbance, this amount of powder can be recycled, to avoid printing The larger metal powder of grain size is settled down in aggregate tank and recycles by the waste of material, link of the cyclone dust removal cylinder as coarse filtration, grain The smaller flue dust in footpath enters refined filtration link by filter element filtering, and the material in aggregate tank can reuse after screening and filtering. Classified filtering more can also effectively extend the service life of filter core simultaneously.

Further, gas control assembly, the gas control assembly bag are provided between cyclone dust collectors and aggregate tank Include a pair of of the butterfly valve for closing or opening the ash discharging hole of cyclone dust collectors lower end, the pipeline section being connected between a pair of of butterfly valve and The oxygen outlet being arranged on pipeline section is provided with the inflating port for being connected to gas tank on the aggregate tank.

Using above technical scheme, aggregate tank can accumulate full with substance after a period of operation, at this point, being further continued for recycling can lead Cyclone dust collectors lower end is caused to block, and loses the effect of coarse filtration.A pair of of butterfly valve is operated at this time, is made close to cyclone dust collectors lower end Butterfly valve closing, the butterfly valve of aggregate tank upper end are opened, and the lower end of cyclone dust collectors are blocked with air, the aggregate tank more renewed rapidly Or the aggregate tank of script is emptied, and pass through the oxygen outlet on inflating port and pipeline section and independent deoxygenation is carried out to aggregate tank, to keep away The aggregate tank for exempting to take back equipment brings oxygen into, and during this, only cyclone dust collectors pause material recycle, remaining process are equal It is unaffected.

Further, the valve group includes being arranged at the return air pneumatic operated valve for controlling its break-make on return air inlet and be arranged at Its break-make is controlled on diffusion mouth diffuses pneumatic operated valve.

Using above technical scheme, during blowback, the gas of discharge can carry part dust particles, be brought directly to return air Mouth is inappropriate, at this point, being turned off return air inlet by return air pneumatic operated valve, and is turned on diffusion mouth by diffusing pneumatic operated valve, instead Gas after blowing is exhausted by diffusion mouth, without entering in SLM device molding room.

Further, the refined filtration part includes the filter chamber connected with refined filtration air inlet pipe, and the filter core is arranged at described In filter chamber, the bottom of the filter chamber is provided with the cone cylinder for accepting the dust filtered out in filter core, and the cone cylinder lower end connection is set It is equipped with dust tank.

Using above technical scheme, what filter core filter was lower during refined filtration is dust, this part with dust tank recycle and regular It empties, the cleaning of active blowback cleaning equipment can be kept.

Further, gas control assembly, the gas control assembly are provided between the dust tank and cone cylinder lower end Including be used to close or open cone cylinder lower end ash discharging hole a pair of of butterfly valve, the pipeline section that is connected between a pair of of butterfly valve and setting In being provided with the inflating port that is connected to gas tank on the oxygen outlet on pipeline section, the dust tank.

Using above technical scheme, dust tank can accumulate full with substance after a period of operation, at this point, being further continued for recycling can lead Cause filter core lower end can not normal ash discharge.A pair of of butterfly valve is operated at this time, makes butterfly valve closing, the aggregate tank close to cyclone dust collectors lower end The butterfly valve of upper end is opened, and the lower end of cone cylinder is blocked with air, the dust tank more renewed rapidly or the dust tank for emptying script, And pass through the oxygen outlet on inflating port and pipeline section and independent deoxygenation is carried out to dust tank, to avoid the dust tank of equipment is taken back by oxygen Gas is brought into.

Further, back-blowing device, the gas tank are respectively provided with there are two the indoor filter cores of filtering and in each filter core On be provided with gas tank air outlet pipe, the gas tank air outlet pipe is connected to by being coupled threeway in two filter cores, the gas tank air outlet pipe with Right-angle impulse valve is set on the pipeline of each filter core connection.

Using above technical scheme, right-angle impulse valve can turn the pressure continuously exported in gas tank to do pulse output, no Only outlet pressure can be promoted, also, the slight vibrations of right-angle impulse valve can be played the role of rocking to filter core, make thereon The vibrated whereabouts of dust particles of adherency.

Further, the top of filter chamber is equipped with end socket, detachably sets head sealing cover in the open top of end socket, end socket with Gasket is provided between head sealing cover；Exhaust outlet is additionally provided on head sealing cover, oxygen probe is provided in exhaust outlet.

Using above technical scheme, end socket and the top of the common sealed filter chamber of head sealing cover are flat to form one at top Face, easily to install right-angle impulse valve.In addition, after filter element replacing, by the operation of a pair of of butterfly valve, by dust tank top into ash Mouth shut-off, and using during dust tank deoxygenation by the use of oxygen outlet as inert gas entrance, using the exhaust outlet at the top of capping as gas Body exports, and can carry out independent deoxygenation to filter chamber at this time.

Further, the filter box of filtering smoke is equipped at diffusion mouth, filter cotton is set in filter box, filter box side wall is removable Unload setting baffle.

Using above technical scheme, be mingled with substantial amounts of dust particles in the gas after blowback, and this portion gas need through It crosses diffusion mouth to be discharged, filter box is set on diffusion mouth, and filter cotton is filled in filter box, it can be to discharging gas on diffusion mouth Body is filtered, and filters off dust particles therein, to prevent that directly discharge influences production environment.And filter cotton is when by one section Between use after, it is necessary to replace, dismantle baffle at this time and the filter cotton filtered in box be exposed, it may be convenient to be filtered cotton Replacement.

Further, the support construction of support cabinet is set below the cabinet, and the support construction includes several adjustable Foot cup is saved, castor is set beside adjustable foot cup.

Using above technical scheme, active blowback cleaning equipment can be moved at SLM device, determined by castor After mobile position, fixed using foot cup is adjusted.In addition, height can also be adjusted to adjust active blowback cleaning by adjusting foot cup The relative altitude of equipment and SLM device, it is easy to use.

Advantageous effect：Compared to the prior art, the filter device of filter core, removal SLM device production are provided with inside equipment Dust in raw dusty gas, by filter device, treated that clean gas returned in SLM device recycles.

In addition, being used for multiple times in order to facilitate filter core, the blowback for blowing off the impurity on filter core is additionally provided with inside filter core and is filled It puts.Dust enrichment inside filter core is too many, does not have suction-operated, starts back-blowing device, and back-blowing device is by inert blowing gas To filter core, the dust on filter core is blown off, realizes that filter core repeatedly utilizes.

Description of the drawings

Fig. 1 is the topology view of active blowback cleaning equipment；

Fig. 2 is air inlet pipeline view；

Fig. 3 is the topology view of cyclone dust collectors；

Fig. 4 is the front view of gas control assembly and aggregate tank;

Fig. 5 is the topology view of filter core；

Fig. 6 is the topology view of back-blowing device；

Fig. 7 is the pipeline view of return air inlet and diffusion mouth.

In figure, 1, cabinet；10th, cabinet plate；11st, cabinet door；12nd, open-work；13rd, electric cabinet；2nd, support construction；20th, adjustable foot Cup；21st, castor；3rd, diffusion mouth；30th, air inlet pipe is diffused；31st, box is filtered；311st, baffle；4th, air inlet；41a, it is coupled threeway；41b、 Wind turbine threeway；42a, return air pneumatic operated valve；42b, pneumatic operated valve is diffused；42c, pneumatic operated valve；43rd, wind turbine；430th, connector is entered the wind；431、 Outlet air connector；5th, return air inlet；50th, air return pipeline；6th, cyclone dust collectors；60th, port is entered the wind；61st, outlet air port；62nd, except dirt cup Body；63rd, cone；64th, ash discharging hole；65th, coarse filtration air inlet pipe；650th, 90 ° of elbows；651st, bellows；652nd, clip gasket；7th, filter Room；70th, refined filtration air inlet pipe；700th, refined filtration air outlet pipe；71st, air inlet；72nd, gas outlet；73rd, end socket；730th, head sealing cover；731st, it is close Packing；732nd, exhaust outlet；733rd, open-work；74th, outer barrel；740th, through hole；741st, pressure sensor is popped one's head in；75th, filter core；750th, cross Support plate；751st, filter core outer barrel；76th, cone cylinder；77th, baffle；78th, back-blowing device；780th, blowback air inlet pipe；7800th, bearing cap； 7801st, bearing；781st, mandrel；7810th, oval open-work；782nd, wind channel tube；7820th, main air duct；7821st, branch air passage；7822、 Ventilation opening；783rd, tracheae；7830th, tracheae port；7832nd, location hole；7833rd, blowback stomata；7834th, stomata is driven；784th, by Appoint；785th, right-angle impulse valve；79th, screw rod；790th, nut；8th, gas control assembly；80th, first manual butterfly valve；81st, second manually Butterfly valve；82nd, oxygen outlet；9a, aggregate tank；9b, dust tank；90th, feed inlet；91st, upper cone；92nd, aggregate tube；93rd, inflating port； 94th, observation panel；95th, transparent glass；96th, rotation and lifting pallet；960th, adjusting bolt；97th, gas tank；970th, gas tank air outlet pipe.

Specific embodiment

The present invention is described in further detail below in conjunction with attached drawing.

Embodiment 1

A kind of active blowback cleaning equipment for selective laser fusing manufacture, as shown in Figure 1, including cabinet 1 and support cabinet The supporting mechanism 2 of body 1.

Supporting mechanism 2 includes adjustable foot cup 20 and castor 21, and the lower surface apex of cabinet 1 is separately installed with four can Foot cup 20 is adjusted, four castors 21 are separately installed with corresponding to the inside of four adjustable foot cups 20.It will be actively by castor 21 Blowback cleaning equipment is slid at corresponding SLM device, the height of adjustable foot cup 20 is adjusted, by active blowback cleaning equipment water It is flat to be fixed on ground.Castor 21 is used with the collocation of adjustable foot cup 20, when needs movement is for selective laser fusing manufacture Gas circulation purification work continuously equipment when, by adjust foot cup 20 lift, equipment is made to be supported in ground by castor 21, to pass through The rolling of castor 21 drives equipment to move integrally；When equipment is moved to appointed place, adjustment downwards adjusts foot cup 20, is allowed to set It is standby to prop, castor 21 is made to be upwardly separated from holding state, at this point, foot cup 20 stablizes support equipment in the position.

Support construction 2 supports cabinet 1 to be fixed on ground, and cabinet 1 includes cabinet plate 10 and is positioned over inside cabinet plate 10 Filter device.Cabinet door 11 is offered on cabinet plate 10, the filter device inside cabinet 1 can be replaced and examined by cabinet door 11 It repaiies.Three open-works 12 are opened up on cabinet plate 10, to draw three pipelines in filter device, three open-works 12 are arranged in order shape Into inverted L shape, wherein：Diffusion mouth 3 and 4 or so arrangement of air inlet, return air inlet 5 are arranged at the lower section of air inlet 4, and air inlet 4 The molding room of SLM device is connected to return air inlet 5, is filtered with the inert gas to its inside.

As shown in Fig. 2, filter device is divided into two parts of coarse filtration and refined filtration, wherein coarse filtration part is connected with air inlet 4, with SLM device is molded indoor gas introducing active blowback cleaning equipment to be filtered.Specifically, coarse filtration part includes whirlwind Deduster 6, air inlet 4 are connected by coarse filtration air inlet pipe 65 with the air inlet port 60 of cyclone dust collectors 6.Coarse filtration air inlet pipe 65 is under And upper is respectively 651, two 90 ° of elbows 650 of bellows.

90 ° of elbows 650 are both provided with sanitation-grade clip gasket 652 with line connection, make at active blowback cleaning equipment In a closed environment, prevent inert gas from being escaped out of active blowback cleaning equipment.It is each in active blowback cleaning equipment A connecting line is connected by 90 ° of elbows 650 and bellows 651, will not be described in great detail afterwards.It is close in coarse filtration air inlet pipe 65 The position of cyclone dust collectors 6 is equipped with pneumatic operated valve 42c, realizes the circulation of the gas between cyclone dust collectors 6 and air inlet 4 and cuts Only.

With reference to Fig. 2 and Fig. 3, cyclone dust collectors 6 include air inlet port 60, dedusting cylinder 62, cone 63, outlet air port 61 with And ash discharging hole 64.The side wall of dedusting cylinder 62 is provided with air inlet port 60, and air inlet port 60 is connected with coarse filtration air inlet pipe 65, will The indoor gas to be clean of SLM device shaping introduces cyclone dust collectors 6.Outlet air is provided at the roof center of dedusting cylinder 62 to lead to Mouth 61, outlet air port 61 is to 62 internal stretch of dedusting cylinder to the position at least exceeding air inlet port 60, to prevent air inlet port The gas introduced in 60 enters next link without cyclone dust removal.The bottom of dedusting cylinder 62 has been wholely set cone 63, cone Internal diameter is gradually reduced body 63 from top to bottom, until the size of the internal diameter and ash discharging hole 64 of 63 bottom of cone matches.

When dusty gas is after air inlet port 60 enters cyclone dust collectors 6, dusty gas is in dedusting cylinder 62 and cone The inner wall of body 63 is made to rotate downward movement, until dusty gas is transported at ash discharging hole 64.Include not in dusty gas Dust after the metal powder of processing and oxidation, since unprocessed metal powder granulates are larger, since centrifugal force acts on, gold Belong to powder to separate from air-flow first, and because the internal diameter of cone 63 is gradually reduced, air-flow more moves downward, metal powder The accumulation at end is easier, until metal powder is discharged by means of gravity through ash discharging hole 64.Gas after separating metal powder It rotates upwards, the gas after initial filter is discharged into cyclone dust collectors 6 by outlet port 61.

With reference to Fig. 3 and Fig. 4, ash discharging hole 64 connects gas control assembly 8, and gas control assembly 8 includes first manual butterfly valve 80th, the second Hand-operated butterfly valve 81 and bellows 651.The lower end pipeline connection first manual butterfly valve 80 of ash discharging hole 64, first manual Butterfly valve 80 connects one end of bellows 651, and the other end of bellows 651 connects the second Hand-operated butterfly valve 81.Bellows 651 is close to One end of one Hand-operated butterfly valve 80 sets an oxygen outlet 82.Oxygen probe is provided in oxygen outlet 82, the row of monitoring in oxygen removal process Go out the oxygen concentration of gas, when oxygen content reaches job requirement, stop deoxygenation operation.

With reference to Fig. 2 and Fig. 3,81 lower section of the second Hand-operated butterfly valve of gas control assembly 8 sets aggregate tank 9a, due in flue dust Coarse granule impurity largely for untapped metal powder, aggregate tank 9a mainly collects what is separated from cyclone dust collectors 6 Metal powder, the metal powder after collection can reuse after treatment.Aggregate tank 9a is positioned over rotation and lifting pallet 96 On, rotation and lifting pallet 96 prevents aggregate tank 9 from being rocked when gas filter plant works for fixing aggregate tank 9.

Rotation and lifting pallet 96 and cabinet are provided with adjusting bolt 960 between 1 bottom, tighten or adjust loose adjusting bolt 960, rotation and lifting pallet 96 can be made upwardly or downwardly to move, so as to push up or unclamp downwards aggregate tank 9a, with It prevents from causing rocking for aggregate tank 9a due to the vibrations when elasticity and wind turbine 43 of bellows 651 start.

Aggregate tank 9a includes upper cone 91, and the top of upper cone 91 offers feed inlet 90, the metal powder of collection pass through into Material mouth 90 falls into aggregate tank 9.The bottom of upper cone 91 has been wholely set aggregate tube 92, is set between upper cone 91 and aggregate tube 92 There are one the inflating ports 93 of opening upwards.An observation panel 94 is opened up on the side wall of aggregate tube 92, passes through nut on observation panel 94 One block of transparent glass 95 is fixed with, to observe the metal powder height of accumulation in aggregate tube 92.Mark has on transparent glass 95 Maximum dust stratification amount when the metal powder height of accumulation reaches maximum dust stratification amount position, is tired out convenient for clearing up in time in aggregate tank 9a Long-pending metal powder.

When the metal powder in aggregate tank 9a reaches maximum dust stratification amount, second at closing gas control assembly 8 is manual Butterfly valve 81 removes aggregate tank 9a, and after collecting the metal powder finished inside aggregate tank 9a, aggregate tank 9a is installed on gas control The lower section of component 8 processed.

With reference to Fig. 2 and Fig. 4, the one side of cyclone dust collectors 6 is provided with electric cabinet 13, and electric cabinet 13 sets active blowback cleaning It is standby to be controlled.The upper surface of electric cabinet 13 is fixed with gas tank 97, and 97 inside of gas tank is full of the inert gas of compressive state.It will collection After batch can 9a ash discharges, the second Hand-operated butterfly valve 81 is opened, first manual butterfly valve 80 is closed, while opens the inflating port on aggregate tank 9a 93 with gas control assembly 8 on oxygen outlet 82.The inert gas being passed through at inflating port 93 in gas tank 97, the inertia after being passed through Gas is discharged at oxygen outlet 82, realizes the local deoxygenation of aggregate tank 9a.Meanwhile the inert gas of gas tank 97 can be to refined filtration Part carries out active cleaning.

Dusty gas is subsequently passed refined filtration part after the initial filter of coarse filtration part, specifically, with reference to Fig. 2 and Fig. 5, essence Filter part includes filter chamber 7, and filter chamber 7 includes end socket 73, outer barrel 74, filter core 75 and cone cylinder 76.The outlet air of cyclone dust collectors 6 Port 61 is connected by refined filtration air inlet pipe 70 with the air inlet 71 of filter chamber 7.The air inlet 71 of filter chamber 7 corresponds to filter chamber 7 Inside set a block baffle 77, when the gas after coarse filtration is passed through filter chamber 7 from air inlet 71, can prevent air-flow from directly rushing To filter core 75, the dust accumulated on filter core 75 is taken out of again, does not have the effect of filtering.

73 side wall of end socket of filter chamber 7 is provided with gas outlet 72, and the top of end socket 73 is provided with dismountable head sealing cover 730, head sealing cover 730 is fixed on by several screws on end socket 73.Gasket 731 is provided between end socket 73 and head sealing cover 730, To ensure the air-tightness in filter chamber 7.Meanwhile the top of head sealing cover 730 is provided with similary two exhaust outlets 732, exhaust outlet 732 Inside it is provided with oxygen probe.It is symmetrically opened up on head sealing cover 730 there are two open-work 733, by screw by filter core 75 at two open-works 733 It is fixed on head sealing cover 730.

End socket 73 is fixed on outer barrel 74 by the bottom of end socket 73 by screw, same between the roof of end socket 73 and outer barrel 74 Sample is provided with gasket 731.The top of outer barrel 74 corresponds to the position of open-work 733 on head sealing cover 730, opens up two through holes 740. Two through holes 740 are set up by cross-shaped fagging 750 there are two filter core 75, and the structure of two filter cores 75 is consistent, with one of them Exemplified by.

Filter core 75 includes filter core outer barrel 751 and the back-blowing device 78 being arranged in inside filter core outer barrel 751.Filter core outer barrel 751 according to the dust concentration size generated in process, the filter core outer barrel 751 for selecting filtration grade different.

With reference to Fig. 5 and Fig. 6, back-blowing device 78 includes blowback air inlet pipe 780, mandrel 781, wind channel tube 782 and tracheae 783.Blowback air inlet pipe 781 is fixed on cross-shaped fagging 750, and the upper end of blowback air inlet pipe 780 passes through screw and head sealing cover 73 On open-work 733 be fixedly connected with one piece of bearing cap 7800,7800 lower section of bearing cap is provided with revolving support blowback air inlet pipe 780 Bearing 7801, the other end of blowback air inlet pipe 781 by wantonly 7524 with mandrel 781 by being connected.Mandrel 781 is upper end opening With the hollow cylinder that blowback air inlet pipe 781 turns on, lower end is shut.

The oval open-work 7810 being connected to there are three being set on the side wall of mandrel 781 inside mandrel 781.In mandrel 781 The upper position for corresponding to oval open-work 7810 is socketed with wind channel tube 782, and wind channel tube 782 includes main air duct 7820 and branch air passage 7821.The both sides of main air duct 7820 are opened up respectively there are two ventilation opening 7822, respectively with screw by two at two ventilation openings 7822 A branch air passage 7821 is fixed.Branch air passage 7821 corresponds to the position of main air duct 7820, offers respectively and main air duct 7820 Two ventilation openings that upper two ventilation openings 7822 match.Liang Ge branches air passage 7821 is hollow design, and two tracheaes 783 are socketed In on Liang Ge branches air passage 7821.

783 center of tracheae offers tracheae port 7830, and tracheae port 7830 corresponds to the logical of Liang Ge branches air passage 7821 Air port 7822, and the size of two tracheae ports 7830 and the ventilation opening 7822 in Liang Ge branches air passage 7821 match.

Tracheae 783 is hollow design, and the middle part of tracheae 783 is set there are two location hole 7832, by location hole 7832 Screw is worn with the threaded hole on branch air passage 7821, tracheae 783 can be fixed at certain altitude, so that tracheae port 7830 are aligned with ventilation opening 7822, introduce a gas into tracheae 783.

Hole there are two types of being set on tracheae 783：Blowback stomata 7833 and the driving gas for driving 78 unitary rotation of back-blowing device Hole 7834, only shows blowback stomata 7833 and driving stomata 7834 in figure on the tracheae 783 on right side in Fig. 6, left side in figure Tracheae 783 on two kinds of hole patterns in fail to show, during installation, the blowback stomata 7833 on two tracheaes 783 is respectively positioned on tracheae On 783 outermost busbar；The busbar where driving stomata 7834 on two tracheaes 783 staggers 180 degree, when two groups of drivings When stomata 7834 is outwards blown, since the two staggers 180 degree, the recoil strength of gas blowout causes back-blowing device 78 to obtain a rotation Turn driving force, its whole axis around mandrel 781 is driven to rotate, the gas sprayed in blowback stomata 7833 carries out filter core 75 instead It blows, the filter core hole of blocking is blown open, continues to work for a period of time.

With reference to Fig. 5 and Fig. 6, the lower end of wind channel tube 782 is connected with screw rod 79, and two are respectively sleeved on the both ends of screw rod 79 Nut 790.The nut 790 of top is fixed with mandrel 781, and filter core outer barrel 751 is fixed on back-blowing device 78 by the nut 790 of lower section On.When filter core 75 needs maintenance, the nut 790 of lower section is unclamped, can easily remove filter core outer barrel 751.The bottom of outer barrel 74 Portion has been wholely set cone cylinder 76, and internal diameter is gradually reduced cone cylinder 76 from top to bottom, until the bottom radius of cone cylinder 76 and ash discharging hole 64 Size matches.The ash discharging hole 64 of filter chamber 7 connects gas control assembly 8, and the other end of gas control assembly 8 is connected with dust Tank 9b.It is filtered since the metal powder in flue dust is most of during coarse filtration, the dust tank 9b at filter chamber 7 is mainly collected Dust in dusty gas.The structure of gas control assembly 8 and dust tank 9b at this and the gas control at cyclone dust collectors 6 The structure of component 8 and aggregate tank 9a processed is consistent, and so it will not be repeated.

With reference to Fig. 2 and Fig. 5, the upper surface of head sealing cover 730, which corresponds at open-work 733, installs there are two right-angle impulse valve 785, Two direct pulse valves 785 are connected by open-work 733 with the blowback air inlet pipe 780 on back-blowing device 78, will be in gas tank 97 Gas introduces blowback air inlet pipe 780 with impulse form.One of right-angle impulse valve 785 is connected to connection threeway by pipeline A valve port of 41a, other two valve port for being coupled threeway 41a connect another right-angle impulse valve 785 and gas tank 97 respectively Gas tank air outlet pipe 970.The effect of two right-angle impulse valves 785 is to introduce gas in filter chamber 7 with impulse form.

In addition, being each provided with a pressure sensor probe 741 in 730 upper surface of head sealing cover and 74 upper surface of outer barrel, lead to Cross the pressure difference between two pressure sensor probes 741 of monitoring in real time, the pressure difference mistake between two pressure sensor probes 741 When big, stop the work of SLM device, start back-blowing device 78 and filter core 75 is cleaned.

As shown in figs. 2 and 7, the dusty gas after refined filtration by the refined filtration air outlet pipe 700 of filter chamber 7 finally by wind turbine 43 It draws.Refined filtration air outlet pipe 700 extends downwardly, and is finally connected on the air inlet connector 430 of wind turbine 43.

With reference to Fig. 7, the outlet air connector 431 of wind turbine 43 is connected on a valve port of wind turbine threeway 41b, wind turbine threeway 41b Second valve port be connected to by air return pipeline 50 on return air inlet 5, return air pneumatic operated valve 42a is provided on air return pipeline 50, use In on or off air return pipeline 50.Gas flowmeter is additionally provided in air return pipeline 50 simultaneously, gas flowmeter passes through circuit It is connected with control system.Gas flowmeter can adjust the pressure for being passed through SLM device shaping indoor gas, when shaping room pressure When larger, adjusting gas flow meter reduces the flow for being passed through shaping indoor gas.Purified gas is by wind turbine 43 and returns Air pipe line 50 drains into the shaping cabin of SLM device at return air inlet 5.

The air inlet 4 and return air inlet 5 of gas filter plant are connected in the molding room of SLM device, are realized SLM and are set The circulating filtration of inert gas in standby molding room.

The last one valve port of wind turbine threeway 41b is connected by diffusing air inlet pipe 30 with diffusion mouth 3, is diffused in air inlet pipe 30 It is provided with and diffuses pneumatic operated valve 42b, diffuse pneumatic operated valve 42b for controlling the gas break-make of diffusion mouth 3, cooperation return air pneumatic operated valve 42a Controlled for the break-make of air return pipeline 50, can realize the gas drawn in filter chamber 7 between return air inlet 5 and diffusion mouth 3 into Row selection switching.

Filter box 31, the filtrating smoke dust that filter box 31 will carry in inert gas are provided at diffusion mouth 3.It is filled in filter box 31 Filtering material, filtering material 0 are generally filter cotton, when filtering material reaches operating limit, can lead to the gear on filter cartridge 31 Plate 311 is replaced in time.

There are two the effects of diffusion mouth 3：First is when carrying out deoxygenation before SLM device starts, and diffusion mouth 3 is the row of equipment Oxygen gas outlet；Second is when back-blowing device 78 works, and has a large amount of impurity in the gas after blowback, this portion gas is by diffusing Mouth 3 is discharged, and needs to close return air inlet 5 by return air pneumatic operated valve 42a at this time, and simultaneously by diffusing pneumatic operated valve 42b conductings Diffusion mouth 3 makes dirty gas after blowback drain into outdoor by diffusion mouth 3, until blowback terminates, reverse drive return air pneumatic operated valve 42a and 42b is diffused, turn off diffusion mouth 3, return air inlet 5 is opened.

The above-mentioned active blowback flushing device operation principle process for melting manufacture for selective laser is described below：Pass through Air inlet 4 is connected with return air inlet 5 with the molding room of SLM device, carries out deoxygenation work to two equipment first, will be owned in equipment Valve is switched on, and only closes the return air pneumatic operated valve 42a on air return pipeline 50, discharge gas is made to walk diffusion mouth 3.Inert gas from into 4 order of air port enters cyclone dust collectors 6, filter chamber 7, filter box 31, and last inert gas is discharged from diffusion mouth 3.When diffusing air inlet Aerobic probe monitors oxygen concentration into the inert gas of discharge reaches job requirement at pipe 30, stops deoxygenation work.

After deoxygenation, the return air pneumatic operated valve 42a at air return pipeline 50 is opened, simultaneously closes off and diffuses putting at air inlet pipe 30 Dissipate pneumatic operated valve 42b.SLM device enters working condition, and dusty gas is passed through at air inlet 4, and dusty gas passes through coarse filtration air inlet pipe 65 enter cyclone dust collectors 6.Under the action of cyclone dust collectors 6, the metal powder in dusty gas is in centrifugal force and inertia force The lower sedimentation of effect, metal powder are accumulate in aggregate tank 9.By the dusty gas that filters for the first time from the outlet air of cyclone dust collectors 6 After port 61 is discharged, enter in filter chamber 7.

Under the refined filtration effect of filter chamber 7, tiny particle is attracted on filter core 75 in the dusty gas after coarse filtration, carefully Small particle is built up on filter core 75, is finally dropped in aggregate tank 9.Dusty gas after coarse filtration is filtered by filter core 75 Afterwards, clean gas is discharged from the gas outlet of filter chamber 7 72.Clean gas enters wind turbine 43, warp by refined filtration air outlet pipe 700 When crossing wind turbine 43 and improving pressure needed for clean gas pressure to SLM device, drain at return air inlet 5, return by air return pipeline 50 It returns in SLM device, realizes the gas circulation filtering of SLM device.

When pressure sensor probe 741 at filter chamber 7 monitors that the pressure difference in filter chamber 7 is excessive, SLM is temporarily ceased Inert gas in gas tank 97 is passed through back-blowing device 78 by the work of equipment.After inert gas pours back-blowing device 78, inertia Gas is discharged from stomata, while air-flow can drive back-blowing device 78 to rotate, so as to fulfill the cleaning to filter core outer barrel 751.Blowback When, return air pneumatic operated valve 42a is closed, opening diffuses pneumatic operated valve 42b, the gas after blowback is made to be filtered by the filter box 31 on diffusion mouth It directly discharges afterwards.

After the pressure difference that pressure sensor probe 741 is monitored in filter chamber 7 reduces, the row of stopping 97 inert gas of gas tank Enter, open SLM device, realize active blowback cleaning equipment does not shut down work.

The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned implementation Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (10)

1. a kind of active blowback cleaning equipment for selective laser fusing manufacture, including cabinet（1）And it is arranged at cabinet （1）Internal filter device, the filter device are connected to the air inlet for meeting SLM device molding room（4）With return air inlet（5）Between, It is characterized in that：The filter device includes at least one filter core（75）, the filter core（75）Be internally provided with from inside to outside The back-blowing device of air blowing（78）, the back-blowing device（78）Air inlet be communicated with gas tank to its supplying inert gas（97）、 Gas outlet is by being arranged at cabinet（1）On diffusion mouth（3）With turned on outside, the diffusion mouth（3）With return air inlet（5）Between set It is equipped with selection gas and enters return air inlet（5）Or pass through diffusion mouth（3）It is emitted into the valve group of air.

2. the active blowback cleaning equipment according to claim 1 for selective laser fusing manufacture, it is characterized in that：It is described Filter device includes coarse filtration part and refined filtration part, passing through refined filtration air inlet pipe between two parts（70）Conducting, the coarse filtration part Including being connected to the air inlet（4）Cyclone dust collectors（6）And connection is arranged at cyclone dust collectors（6）The aggregate tank of bottom （9a）, the filter core（75）It is arranged at refined filtration part.

3. the active blowback cleaning equipment according to claim 2 for selective laser fusing manufacture, it is characterized in that：Whirlwind Deduster（6）With aggregate tank（9a）Between be provided with gas control assembly（8）, the gas control assembly（8）Including being used to seal Close or open cyclone dust collectors（6）The ash discharging hole of lower end（64）A pair of of butterfly valve, the pipeline section that is connected between a pair of of butterfly valve and The oxygen outlet being arranged on pipeline section（82）, the aggregate tank（9a）On be provided with and be connected to gas tank（97）Inflating port（93）.

4. the active blowback cleaning equipment according to claim 2 for selective laser fusing manufacture, it is characterized in that：It is described Valve group includes being arranged at return air inlet（5）The upper return air pneumatic operated valve for controlling its break-make（42a）And it is arranged at diffusion mouth（3）Upper control That makes its break-make diffuses pneumatic operated valve（42b）.

5. the active blowback cleaning equipment according to claim 2 for selective laser fusing manufacture, it is characterized in that：It is described Refined filtration part includes and refined filtration air inlet pipe（70）The filter chamber of connection（7）, the filter core（75）It is arranged at the filter chamber（7） It is interior, the filter chamber（7）Bottom be provided with undertaking filter core（75）The cone cylinder of the dust inside filtered out（76）, the cone cylinder（76）Under End is provided with and communicated with dust tank（9b）.

6. the active blowback cleaning equipment according to claim 5 for selective laser fusing manufacture, it is characterized in that：It is described Dust tank（9b）With cone cylinder（76）Gas control assembly is provided between lower end（8）, the gas control assembly（8）Including being used for Rotation cone cylinder is opened in closing（76）The ash discharging hole of lower end（64）A pair of of butterfly valve, the pipeline section that is connected between a pair of of butterfly valve and set The oxygen outlet being placed on pipeline section（82）, the dust tank（9b）On be provided with and be connected to gas tank（97）Inflating port（93）.

7. the active blowback cleaning equipment according to claim 6 for selective laser fusing manufacture, it is characterized in that：It is described Filter chamber（7）Interior filter core（75）There are two and each filter core（75）Inside it is respectively provided with back-blowing device（78）, the gas tank（97）On It is provided with gas tank air outlet pipe（970）, the gas tank air outlet pipe（970）By being coupled threeway（41a）It is connected to two filter cores（75）It is interior, The gas tank air outlet pipe（970）With each filter core（75）Right-angle impulse valve is set on the pipeline of connection（785）.

8. the active blowback cleaning equipment according to claim 7 for selective laser fusing manufacture, it is characterized in that：Filtering Room（7）Top be equipped with end socket（73）, end socket（73）Open top on head sealing cover is detachably set（730）, end socket（73）With Head sealing cover（730）Between be provided with gasket（731）；Head sealing cover（730）On be additionally provided with exhaust outlet（732）, exhaust outlet（732）It is interior It is provided with oxygen probe.

9. the active blowback cleaning equipment according to claim 1 for selective laser fusing manufacture, it is characterized in that：It is close Diffusion mouth（3）Filter box of the place equipped with filtering smoke（31）, filter box（31）Interior setting filter cotton filters box（31）Side wall is detachably set Baffle（311）.

10. the active blowback cleaning equipment according to claim 1 for selective laser fusing manufacture, it is characterized in that：Institute State cabinet（1）Lower section sets support cabinet（1）Support construction（2）, the support construction（2）Including several adjustable foot cups （20）, adjustable foot cup（20）Side sets castor（21）.