CN107097415A - A kind of manufacture method with air film hole turbo blade - Google Patents
A kind of manufacture method with air film hole turbo blade Download PDFInfo
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- CN107097415A CN107097415A CN201710427601.4A CN201710427601A CN107097415A CN 107097415 A CN107097415 A CN 107097415A CN 201710427601 A CN201710427601 A CN 201710427601A CN 107097415 A CN107097415 A CN 107097415A
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- Prior art keywords
- turbo blade
- model
- air film
- blade
- wax
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- 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
- B33Y50/00—Data acquisition or data processing for additive manufacturing
-
- 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 present invention relates to a kind of manufacture method with air film hole turbo blade, first using the threedimensional model that turbo blade is set up out by UG softwares；Go out the entity of turbo blade using laser fast forming machine printing speed again；The metal solid of turbo blade is cast out finally by precision-investment casting.Rapid laser-shaping technique is combined by this method with melted module precise casting technology, can not only realize the rapid conversion from turbo blade Three Dimensional Design Model to turbo blade steel entity, while the turbo blade precision processed is high, cost is low.
Description
Technical field
Field is manufactured the present invention relates to turbo blade, and in particular to a kind of manufacturer with air film hole turbo blade
Method.
Background technology
Turbo blade is widely used in aviation, household electrical appliances and various industrial uses as the core component of power-equipment.Its
Updating for structure and material is that the mankind improve energy utilization rate, obtain high-performance equipment (generating equipment) and product is (like flying
Machine) key.During work, the high-temperature fuel gas that it is not only often changed is surrounded, also subject to the huge of rotation generation at a high speed
Centrifugal force, gas force and vibrational loading etc..In addition, it also suffers corrosion and etch caused by high-temperature fuel gas, thus turbine work
The working environment for making blade is very severe.Because it is in, temperature highest, stress is most complicated, the worst position of environment, so
Blade is listed in the first key component, and is described as " jewel on crown ".
Therefore, the process technology of turbo blade is one of key technical problem for being paid close attention to both at home and abroad over nearly 20 years.Wherein whirlpool
The performance level (particularly temperature capability) of impeller blade turns into the important symbol of the advanced degree of thermodynamic apparatus, in a sense
Say, be also one of important symbol of manufacturing technology level.With design increasingly sophisticated of blade construction and will to material hot property
The raising asked, traditional vane manufacturing technique is restricted by material and manufacturing technology, has been difficult to the manufacture for meeting new blade
It is required that.With the raising of turbine inlet fuel gas temperature, the unit power of engine is also increasing sharply.Turbo blade temperature capability
Depend on air film hole, traditional air film hole process and development cycle length, cost are high；Complex technical process, control difficulty is big, no
Beneficial to the update of product；It is difficult to the manufacture of the hollow blade of spatial intersecting；Core shell is formed separately, easy during assembling
Position error is produced, blade is easily perforated, and yield rate is low.
The content of the invention
It is an object of the invention to provide a kind of manufacture method with air film hole turbo blade, it can effectively solve above-mentioned ask
Topic, solves the problems such as machining accuracy is relatively low, process-cycle long cost is higher present in turbo blade.
To achieve the above object, present invention employs following technical scheme:
A kind of manufacture method with air film hole turbo blade, it is characterised in that:Including following operation:
S1:Build the threedimensional model of turbo blade；
S2:Print the resin solid of turbo blade；
S3:Cast turbo blade test specimen.
Further scheme is:
Operate in S1:Blade is scanned by grating spatial digitizer, figure of the UG softwares to scanning is then utilized
Progress handles the threedimensional model for obtaining corresponding turbo blade.
Detailed operation is:
S11:Demarcation distance is determined according to field range, selection focal length is 420mm；The field range of camera lens selection 200；Adjust
Whole projected fringe, 23 are switched to by striped, are then rotated the Focussing projection aperture of camera lens, are made to be projected out clearly light；
S12:The angle of left and right camera is adjusted, camera center line is overlapped with projection center line；Adjust the collection gray scale of two cameras
It is worth between 100-200 so that two cameras are consistent, while ensureing clear-cut texture；Camera is demarcated, during calibrating parameters
Parameter needs correspondence, and selects appropriate calibrating block according to the visual field of selection, and calibrating block is placed into stable, upright；Open again
CPC control softwares and " preview in win more " observation CPC control objects, makes in calibrating block two vertical white points coincidences, so
After carry out test strip, it is ensured that can sweep to a little to data；Finally, the scanning to blade is carried out；
S13:Figure after scanning is post-processed, " sampling ratio " of " file option " is set to 1/4；Using certainly
Dynamic " disconnected " item removed in making an uproar, is set to " low ", " size " is set to " 5 " by " separation "；Will be " sensitive with " external acnode " item
Degree " is set to 80；Selection " free form surface shape " sets " smooth rank " as third gear, and deviation limitation typically takes 0.2mm；
S14:Obtained turbo blade basic model is imported in UG, model is carried out to repair perfect, air film hole is determined
Position, obtain the final turbo blade threedimensional model containing air film hole.
Operate in S2:The threedimensional model of turbo blade is gone out to the tree of turbo blade by laser fast shaping machine printing speed
Fat entity.
Specific operation is as follows:
S21:The Turbine Blade Model CAD optimization design stages
S211:Shrinkage factor of the photosensitive resin in rapid shaping is determined, with reference to turbo blade founding materials, determines that fusible pattern is cast
The shrinkage factor of process in which materials is made, the threedimensional model of blade is amplified in UG softwares finally according to the two shrinkage factors；
S212:The threedimensional model of blade is exported as into " STL " formatted file in UG；
S22:Printing speed pretreatment stage
S221:" STL " file imports the pre-processing software Cura of rapid shaping technique by derived from；
S222:According to used rapid shaping printer, corresponding machine is added in Cura softwares and machine is joined
Number is set；
S223:The beginning and end code of printer processed file is set up in Cura, and is preserved；
S224:The support and hierarchy parameters, support parameters, laser power, sweep parameter and painting of printing are set in Cura
Layer parameter；
S225:AUTOMATIC ZONING is carried out using Cura softwares, while the file for being layered completion is preserved and printer is converted into
The file type that can be recognized；
S23:Rapid shaping prints the free forming stage
S231:In the control computer that the file changed is imported to photocuring printer；
S232:Control computer automatically generates control instruction according to the file of importing and Turbine Blade Model is quickly beaten
Print；
S24:Printing speed post-processing stages
S241:Carried out cleaning with alcoholic solution while removing the support of model；
S242:Polished with waterproof abrasive paper and finally model is put into solidification case and solidified.
Operate in S3:Printed resin solid is obtained into turbo blade test specimen by investment pattern precision casting technique.
Detailed step is:
S31:Printed mould is cleaned with appropriate solvent, the impurity of die surface, wax dirt etc. are cleaned dry
Net and drying processed of drying in the air；From air film hole of the water-soluble and higher releasing agent of fusing point to printed turbo blade resin solid
Spray 3-5 times repeatedly, mould is stood a hour by every minor tick about 10-20 minutes after the spraying of last layer；
S32:The higher wire of fusing point is chosen, first wire surface is cleaned with appropriate solvent, by wire
The impurity on surface is cleaned up；Then spraying 3-5 times repeatedly is carried out to wire surface using the higher releasing agent of fusing point, every time
Interval about 10-20 minutes, stands a hour by mould after the spraying of last layer, the wire sprayed is placed on into air film hole
It is interior so as to scribble being partially disposed in air film hole for releasing agent, and beyond air film hole 10mm；
S33:Middle temperature wax is put into water proof in stainless steel or aluminium vessel to heat so that it becomes molten condition；Secondly will melting
The wax of state is rested in bucket, be poured into when its temperature drops to 65 DEG C or so stir in wax machine carry out strong stirring make its Cheng Jun
Even paste；Slack wax is placed in heat-preserving container, temperature control is at 56-58 DEG C；Turbo blade die surface is cleaned out and applied
Last layer releasing agent；
S34:Runner mould is placed on pneumatic wax mold die casting machine, and the casting mouthful of runner mould is penetrated into wax with press injector
Nozzle is aligned；Runner mould and one layer of parting compound for gushing mould inner wall thin are opened, nut, closed die is put；Pass through pressure injection
Machine into mould, extracts wax pressure injection out fuse after the completion of pressure injection, open the model that mould takes out running channel, finally clear up on mould
Abrasive material is remained, grinding tool will be closed and suppressed next time；
S35:Size to turbo blade and each running channel wax-pattern is checked, the wax-pattern for having dimensional problem is picked
Remove, surfacing is carried out to the wax-pattern of size qualification；One end of sprue is welded together with sprue cup heating with flatiron, will
The other end of sprue welds together with the heating of cross gate flatiron, then multiple ingates are welded on cross gate；Pass through
Multiple ingates are welded to cross gate so that the quick cast to the turbo blade with air film hole can be realized by constituting module；
S36:Model is slowly immersed into painting slurry about 3~4 seconds with 30 ° or so of angle of inclination, then with slightly fast speed
Take out module and overturn；The module of uniform coating is stretched into stuccoing is carried out in floating sand bucket, allow all surfaces to cover last layer not
Carry out sand, and module placement is dried for 12 hours solidifies second layer shell；Repeat 5 times, complete shell process processed；
S37:The above-mentioned model for making shell is put into dewaxing steam kettle and keeps 160 DEG C of temperature, is carried out 20 minutes or so
Dewaxing；The model for having taken off wax is checked, to crackle<The carrying out of 0.5mm is repaired, occur fall in flakes or, split or
Person's crackle>0.5mm situation carries out scrapping processing；
S38:The model for having taken off wax is put into high-temperature roasting furnace and is heated between 900 DEG C -1100 DEG C, 40-50 points of roasting
Clock or so, burned shell is white or rose color；The molten steel of melting is poured into each shell by the sprue gate of each shell again
In, its cooling is stood after the completion of casting；
S39:Turbo blade casting after cooling is first passed through into vibrations hulling machine and removes shell；Again will by flame cutting machine
Turbo blade in running gate system carries out cutting with running gate system and separated；Soaked and be rinsed with giant in water
The releasing agent between air film hole and tungsten filament is completely dissolved, tungsten filament is extracted out, blasting treatment finally is carried out to turbo blade product, obtained
To final turbo blade.
A kind of method for fast mfg of the turbo blade with air film hole is provided in above-mentioned technical proposal, uses pass through first
UG softwares set up out the threedimensional model of turbo blade；Go out the entity of turbo blade using laser fast forming machine printing speed again；
The metal solid of turbo blade is cast out finally by precision-investment casting.This method is smart by rapid laser-shaping technique and fusible pattern
Close foundry engieering is combined, and can not only realize quick turn from turbo blade Three Dimensional Design Model to turbo blade steel entity
Change, while the turbo blade precision processed is high, cost is low, compared with prior art, have the advantage that:
1st, blade inner chamber arbitrarily complicated, with spatial intersecting feature, monoblock type ceramic-mould, core type can be molded
Shell uses identical material, is molded simultaneously, without combination assembling.
2nd, core compacting tool set and Wax mold need not be designed and produced, quick exploitation simplifies technique, reduces cost, not by
Mould, fixture limitation, it is easy to update.
3rd, core shell is once-forming, reduces the shell time processed, can be with straight forming air film hole, and is molded special-shaped air film
Hole.
Brief description of the drawings
Fig. 1 is schematic flow sheet of the invention；
Fig. 2 is the three-dimensional model diagram of turbo blade containing air film hole obtained by raster scanning and UG softwares；
Fig. 3 is the technological process of rapid shaping technique.
Embodiment
In order that objects and advantages of the present invention are more clearly understood, the present invention is carried out specifically with reference to embodiments
It is bright.It should be appreciated that following word is only to describe one or more of specific embodiments of the invention, not to the present invention
The protection domain specifically asked carries out considered critical.
The application principle of the present invention is explained in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the method for fast mfg of the turbo blade with air film hole of the embodiment of the present invention comprises the following steps:
S1:The turbo blade containing air film hole is scanned using raster scanner:Utilize grating spatial digitizer pair
Turbo blade entity containing air film hole is scanned.First, pre-treatment is carried out to scanner, first determines demarcation distance, selection mirror
The data such as head, adjustment camera angle are adjusted, and be then scanned, the model in computer is post-processed after the completion of scanning
And it is perfect to model progress using UG softwares, obtain the model of the turbo blade containing air film hole.
S2:The model of turbo blade to building up carries out rapid shaping:According to the characteristics of rapid shaping printing technique and institute
Material, the present invention selects SLA forming techniques, and moulding material is photosensitive resin.First in UG, established according to above-mentioned
The size of turbo blade threedimensional model sets up corresponding model, then asks difference operation to obtain corresponding turbo blade three-dimensional by boolean
Model.Again to turbo blade threedimensional model carry out layered shaping, and by resulting synusia information with printing technological parameter phase
Close, the numerical control code of printer is converted into by the digital interface of printer；Last printer carries out synusia according to numerical control code
Processing, synusia accumulation finally shape the turbo blade entity with air film hole.
S3:Investment pattern precision casting is carried out to the turbo blade with air film hole:The positions such as turbo blade leading edge, blade are devised largely
Air film hole, aperture is typically in 0.2-0.8mm, and space angle is complicated, and difficulty of processing is high., will be printed in investment casting process
Mould (such as acetone) is cleaned with appropriate solvent, the impurity of die surface, wax dirt etc. are cleaned up, and the system of drying in the air is dry
It is dry；From the water-soluble and higher releasing agent of fusing point (as agreed day PMR), to the air film of printed turbo blade resin solid
Hole spray 3-5 times repeatedly, and mould is stood a hour by every minor tick about 10-20 minutes after the spraying of last layer；Choosing
The higher wire of fusing point (such as tungsten filament) is taken, first (such as acetone) is cleaned to tungsten filament with appropriate solvent, by tungsten filament table
The magazine in face is cleaned up；Then wire surface is sprayed repeatedly using the higher releasing agent of fusing point (as agreed day PMR)
3-5 times, mould is stood a hour, by the wire sprayed by every minor tick about 10-20 minutes after the spraying of last layer
It is placed in air film hole so that scribble being partially disposed in air film hole for releasing agent, and beyond air film hole 10mm；Then by resin
Model is sticked with wax running gate system and wax-pattern is made, then will form formwork in wax-pattern immersion ceramic sand liquid, and roasting is carried out after drying and is sloughed
Wax-pattern formation Tao Mo, the high temperature casting of molten steel formation turbo blade is poured into a mould by sprue gate.It is real to the steel of turbo blade again
Body successively progress carburizing, quenching, tempering, the post processing of sandblasting make turbo blade reach hardness requirement and improve its ductility.
Finally soaked with water, extract wire out.Finally give complete turbo blade entity.
The operation principle to the present invention is further described below in conjunction with the accompanying drawings.
The method for fast mfg towards the turbo blade with air film hole of the embodiment of the present invention comprises the following steps:
1st, the mathematical modeling of the turbo blade with air film hole is set up
(1) pre-treatment:Demarcation distance is determined according to field range first, selection focal length is 420mm；Camera lens selection 200
Field range；Projected fringe is adjusted, striped is switched to 23, the Focussing projection aperture of camera lens is then rotated, makes to be projected out
Clearly light.
(2) scan:The angle of left and right camera is adjusted, is that camera center line is overlapped with projection center line；Adjust the collection of two cameras
Gray value is between 100-200 so that two cameras are adjusted to basically identical, while ensureing clear-cut texture.Camera is demarcated,
Parameter needs correspondence during calibrating parameters, and selects appropriate calibrating block according to the visual field of selection, and calibrating block is placed into stable, straight
It is vertical；Open again CPC control softwares and " preview in win more " observation CPC control objects, make in calibrating block two it is vertical white
Point is overlapped.Then test strip is carried out, it is ensured that can sweep to a little to data；Finally, the scanning to blade is carried out.
(3) post-process:Figure after scanning is post-processed, in order to improve the speed of computer by " file option "
" sampling ratio " is set to 1/4；Using automatic " disconnected " item removed in making an uproar, " separation " is set to " low ", " size " is set
For " 5 "；In order to which the scatterplot that will deviate from principal point cloud is removed, " susceptibility " is set to 80 with " external acnode " item；In order to make an uproar
The point of articulation is preferably minimized, and can preferably show the shape of object correlation, and selection " free form surface shape " sets " smooth rank " as the 3rd
Shelves, deviation limitation typically takes 0.2mm.
(4) obtained turbo blade basic model is imported in UG, model is carried out to repair perfect, air film hole is determined
Position, obtains the final turbo blade threedimensional model containing air film hole.
2nd, the model progress rapid shaping of turbo blade is specifically included:
(1) when due to using liquid photosensitive resin for material progress 3D printing, photosensitive resin model meeting in the curing process
Shrink and shrinkage factor is 4%；Investment pattern precision casting also relates to 2 shrinkage factors, and one is when using middle temperature wax for material making wax-pattern
Shrinkage factor be 0.9%-1.3%, another is shrinkage factor when use No. 45 steel to pour into a mould steelwork for 1.3%-2.0%；Knot
Close actual conditions and determine the shrinkage factor in each stage, and obtain the total shrinkage of model.Ordered again by UG " scaling body " to straight
The master mold threedimensional model of flank of tooth gear carries out overall amplification according to total shrinkage；
(2) threedimensional model of turbo blade is carried out to " file " → " export " → " STL " operations in UG；In ejection
It is " binary system " that output type is set in " rapid shaping " menu, and " triangle tolerance " and " adjacent tolerance " is set to 0.08, selection
" automatic normal direction generation "；The master mold model of straight-sided flank gear is selected in " class selection " menu of ejection as " selecting object ",
Remaining, which is set, keeps acquiescence, completes " STL " form export of model；
(3) the pre-processing software Cura of 3D printing is opened, " STL " model file is imported into Cura；" configure to
Lead " according to the model of selected laser fast forming machine set " printer name " be " Stratasys " in interface, " print
The print length of machine, print span, printing height " is respectively 255mm, 252mm, 200mm, and " diameter of printhead " is 0.4mm；
Operated by " machine " → " machine setting ", the 3D printer energy is selected in " G code type " item in " machine setting " menu
The G code form of identification is Stratasys；Finally in " beginning/end G code " item by " start.gcode " and
" end.gcode " code replaces with " Dual_Head_start " and " Dual_Head_send " respectively, sets up out control laser fast
The G code original document of fast forming machine；
(4) basic parameter of 3D printing is set in " underlying parameter " menu of Cura softwares:In order to ensure that model possesses
Higher precision, " floor height " takes 0.1mm；In order to ensure that model has high firmness, the value of " bottom/top thickness " takes
1.2mm, it is 1.2mm that the value of " outer casing thickness " wants equal with the value of " bottom/top thickness " simultaneously；" packed density " typically takes
20%；In order to ensure the quality of model, " print speed " typically takes 30-40mm/s；According to the model of selected photosensitive resin
Being set for VeroWhitePlus RGD835 " print temperature " is 20 DEG C；" supporting type " and " platform type of attachment " being set to "
Without ", complete the setting of " underlying parameter " menu；
The advanced parameters of 3D printing is set in " advanced parameters " menu of Cura softwares:" pumpback length " is set to
3.5mm, prevents from freeing card silk phenomenon；" first floor floor height " is set to 0.4mm, model has been printed first layer and be pasted onto well
On workbench；" nozzle translational speed " is set to 100mm/s；According to the print speed of setting, " inside/outside layer print speed " is set
30mm/s is set to, other specification keeps default setting, completes the parameter setting of " advanced parameters " menu；
(5) Cura softwares can automatically enter according to set 3D printing parameter to the threedimensional model of straight-sided flank gear female die
Row hierarchy slicing, and corresponding G code program is generated after the slicing is completed, the G code program is saved in SD card；
(6) SD card is inserted into the Object Studio carried in laser fast shaping machine by laser fast forming machine
Software reads the G code in SD card, and total hierarchy number of now software meeting display model, time-write interval, printing need how many material
The information such as material, and then go out the resin solid of turbo blade according to G code control 3D printer printing speed；
(7) shoveled with grafter along the position that model is contacted with workbench into by the resin solid of printed turbo blade
Taken out from workbench, then be coated onto with a small amount of industrial alcohol the liquid resin that wiping is remained on resin mould on cloth；Secondly
Surface polishing is carried out to bottom, the side of model with waterproof abrasive paper, model is rinsed with clear water after having polished；Finally model is put into solid
Change the ultraviolet radiation-curable processing that about 15min is carried out in case.
3rd, turbo blade entity of the model casting with air film hole
(1) printed mould is cleaned into (such as acetone) with appropriate solvent, by the impurity of die surface, wax dirt etc.
Clean up, and drying processed of drying in the air；From the water-soluble and higher releasing agent of fusing point (as agreed day PMR), to printed turbine
The air film hole of blade resin solid spray 3-5 times repeatedly, and every minor tick about 10-20 minutes will after the spraying of last layer
Mould stands a hour；
(2) the higher wire (such as tungsten filament) of fusing point is chosen, (such as third is first cleaned to tungsten filament with appropriate solvent
Ketone), the magazine of tungsten filament is cleaned up；Then using the higher releasing agent of fusing point (as agreed day PMR) to wire surface
Spray 3-5 times repeatedly, mould is stood a hour after the spraying of last layer, will sprayed by every minor tick about 10-20 minutes
Good wire is placed in air film hole so that scribble being partially disposed in air film hole for releasing agent, and beyond air film hole 10mm；
(3) and then middle temperature wax is put into water proof heating (heating-up temperature is at 85 DEG C or so) in stainless steel or aluminium vessel makes it
It is changed into molten condition；Secondly the wax of molten condition is rested in bucket, is poured into when its temperature drops to 65 DEG C or so and stirs wax
Strong stirring is carried out in machine makes it into uniform paste；Slack wax is placed in heat-preserving container, temperature control is at 56-58 DEG C；By turbine
Blade mold removing surface is clean and applies last layer releasing agent；
(4) runner mould (including sprue mould, cross gate mould and ingate mould) is placed on pneumatic wax-pattern pressure injection
On machine, and the nozzle that the casting mouthful of runner mould is penetrated into wax with press injector is aligned；Open runner mould and mould inner wall is gushed
One layer of thin parting compound, puts nut, closed die；By press injector by wax pressure injection into mould, extract fuse after the completion of pressure injection out,
The model that mould takes out running channel is opened, the residual abrasive material finally cleared up on mould will close grinding tool and be suppressed next time；
(5) size to turbo blade and each running channel wax-pattern is checked, the wax-pattern for having dimensional problem is rejected,
Surfacing is carried out to the wax-pattern of size qualification (including to remove the residual side on wax-pattern with blade and cross or die parting line；With repairing wax
Repair the recess on surface etc.)；One end of sprue is welded together with sprue cup heating with flatiron, by the other end of sprue
Weld together with the heating of cross gate flatiron, then multiple ingates are welded on cross gate；By welding many to cross gate
Individual ingate can realize the quick cast to the turbo blade with air film hole so as to constitute module；
(6) model is slowly immersed into painting slurry about 3-4 seconds with 30 ° or so of angle of inclination, then taken with slightly fast speed
Go out module and overturn；The module of uniform coating is stretched into stuccoing is carried out in floating sand bucket, allowed all surfaces to cover last layer and do not come
Sand, and module placement is dried for 12 hours solidifies second layer shell；Repeat step 65 times, completes shell process processed；
(7) the above-mentioned model for making shell is put into dewaxing steam kettle and keeps 160 DEG C of temperature, carried out 20 minutes or so
Dewaxing；The model for having taken off wax is checked, to crackle<The carrying out of 0.5mm is repaired, occur fall in flakes or, split or
Crackle>0.5mm situation carries out scrapping processing；
(8) model for having taken off wax is put into high-temperature roasting furnace and be heated between 900 DEG C -1100 DEG C, is calcined 40-50 minutes
Left and right, burned shell is white or rose color；The molten steel of melting is poured into each shell by the sprue gate of each shell again,
Its cooling is stood after the completion of casting；
(9) the turbo blade casting after cooling is first passed through into vibrations hulling machine and removes shell；Again will by flame cutting machine
Turbo blade in running gate system carries out cutting with running gate system and separated；Soaked and be rinsed with giant in water
The releasing agent between air film hole and tungsten filament is completely dissolved, tungsten filament is extracted out, blasting treatment finally is carried out to turbo blade product, obtained
To final turbo blade.
The present invention fails equipment, mechanism, component and the operating method of detailed description, and those of ordinary skill in the art are optional
Used and implemented with the equipment with identical function, mechanism, component and operating method commonly used in the art.Or according to life
Identical equipment, mechanism, component and the operating method that general knowledge living is selected are used and implemented.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, after content described in the present invention is known, under the premise without departing from the principles of the invention, it can also be made some
Equal conversion and replacement, these, which convert and substituted on an equal basis, also should be regarded as belonging to protection scope of the present invention.
Claims (7)
1. a kind of manufacture method with air film hole turbo blade, it is characterised in that:Including following operation:
S1:Build the threedimensional model of turbo blade；
S2:Print the resin solid of turbo blade；
S3:Cast turbo blade test specimen.
2. the manufacture method according to claim 1 with air film hole turbo blade, it is characterised in that in operation S1:Pass through
Grating spatial digitizer is scanned to blade, and then the figure progress of scanning is handled using UG softwares and obtains corresponding turbine
The threedimensional model of blade.
3. the manufacture method according to claim 1 with air film hole turbo blade, it is characterised in that in operation S2:By whirlpool
The threedimensional model of impeller blade goes out the resin solid of turbo blade by laser fast shaping machine printing speed.
4. the manufacture method according to claim 1 with air film hole turbo blade, it is characterised in that in operation S3:It will beat
Printed resin solid obtains turbo blade test specimen by investment pattern precision casting technique.
5. the manufacture method according to claim 2 with air film hole turbo blade, it is characterised in that operation S1 is:
S11:Demarcation distance is determined according to field range, selection focal length is 420mm；The field range of camera lens selection 200；Adjustment is thrown
Shadow stripe line, 23 are switched to by striped, are then rotated the Focussing projection aperture of camera lens, are made to be projected out clearly light；
S12:The angle of left and right camera is adjusted, camera center line is overlapped with projection center line；The collection gray value for adjusting two cameras is
Between 100-200 so that two cameras are consistent, while ensureing clear-cut texture；Camera is demarcated, parameter during calibrating parameters
Correspondence is needed, and appropriate calibrating block is selected according to the visual field of selection, calibrating block is placed stable, upright；CPC controls are opened again
Software processed and " preview in win more " observation CPC control objects, makes in calibrating block two vertical white points coincidences, then carry out
Test strip, it is ensured that can sweep to a little to data；Finally, the scanning to blade is carried out；
S13:Figure after scanning is post-processed, " sampling ratio " of " file option " is set to 1/4；Using removing automatically
" disconnected " item in making an uproar, is set to " low ", " size " is set to " 5 " by " separation "；With " external acnode " item by " susceptibility "
It is set to 80；Selection " free form surface shape " sets " smooth rank " as third gear, and deviation limitation typically takes 0.2mm；
S14:Obtained turbo blade basic model is imported in UG, model is carried out to repair perfect, the position of air film hole is determined
Put, obtain the final turbo blade threedimensional model containing air film hole.
6. the manufacture method according to claim 3 with air film hole turbo blade, it is characterised in that operation S2 is:
S21:The Turbine Blade Model CAD optimization design stages
S211:Shrinkage factor of the photosensitive resin in rapid shaping is determined, with reference to turbo blade founding materials, model casting mistake is determined
The shrinkage factor of material in journey, is amplified finally according to the two shrinkage factors in UG softwares to the threedimensional model of blade；
S212:The threedimensional model of blade is exported as into " STL " formatted file in UG；
S22:Printing speed pretreatment stage
S221:" STL " file imports the pre-processing software Cura of rapid shaping technique by derived from；
S222:According to used rapid shaping printer, corresponding machine is added in Cura softwares and machine parameter is entered
Row setting；
S223:The beginning and end code of printer processed file is set up in Cura, and is preserved；
S224:Support and hierarchy parameters, support parameters, laser power, sweep parameter and the coating ginseng of printing are set in Cura
Number；
S225:AUTOMATIC ZONING is carried out using Cura softwares, can be with while will be layered that the file that completes preserves and be converted into printer
The file type of identification；
S23:Rapid shaping prints the free forming stage
S231:In the control computer that the file changed is imported to photocuring printer；
S232:Control computer automatically generates control instruction according to the file of importing and carries out printing speed to Turbine Blade Model；
S24:Printing speed post-processing stages
S241:Carried out cleaning with alcoholic solution while removing the support of model；
S242:Polished with waterproof abrasive paper and finally model is put into solidification case and solidified.
7. the manufacture method according to claim 4 with air film hole turbo blade, it is characterised in that operation S3 is:
S31:Printed mould is cleaned with appropriate solvent, the impurity of die surface, wax dirt etc. are cleaned up simultaneously
Dry in the air drying processed；The air film hole of printed turbo blade resin solid is carried out from the water-soluble and higher releasing agent of fusing point
Spray 3-5 times repeatedly, mould is stood a hour by every minor tick about 10-20 minutes after the spraying of last layer；
S32:The higher wire of fusing point is chosen, first wire surface is cleaned with appropriate solvent, by wire surface
Impurity clean up；Then wire surface is carried out using fusing point higher releasing agent spraying 3-5 times repeatedly, per minor tick
About 10-20 minute, mould is stood into a hour after the spraying of last layer, the wire sprayed is placed in air film hole,
So that being partially disposed in air film hole of releasing agent is scribbled, and beyond air film hole 10mm；
S33:Middle temperature wax is put into water proof in stainless steel or aluminium vessel to heat so that it becomes molten condition；Secondly by molten condition
Wax rest in bucket, be poured into stir in wax machine when its temperature drops to 65 DEG C or so and carry out strong stirring and make it into uniform
Paste；Slack wax is placed in heat-preserving container, temperature control is at 56-58 DEG C；Turbo blade die surface is cleaned out and one is coated
Layer releasing agent；
S34:Runner mould is placed on pneumatic wax mold die casting machine, and the casting of runner mould mouth is penetrated to the nozzle of wax with press injector
Align；Runner mould and one layer of parting compound for gushing mould inner wall thin are opened, nut, closed die is put；Will by press injector
Wax pressure injection extracts fuse out into mould after the completion of pressure injection, open the model that mould takes out running channel, the residual finally cleared up on mould
Abrasive material, will close grinding tool and is suppressed next time；
S35:Size to turbo blade and each running channel wax-pattern is checked, the wax-pattern for having dimensional problem is rejected, right
The wax-pattern of size qualification carries out surfacing；One end of sprue is welded together with sprue cup heating with flatiron, will directly be poured
The other end in road welds together with the heating of cross gate flatiron, then multiple ingates are welded on cross gate；By to horizontal stroke
Running channel welds multiple ingates can realize the quick cast to the turbo blade with air film hole so as to constitute module；
S36:Model is slowly immersed into painting slurry about 3~4 seconds with 30 ° or so of angle of inclination, then is taken out with slightly fast speed
Module is simultaneously overturn；The module of uniform coating is stretched into stuccoing is carried out in floating sand bucket, allowed all surfaces to cover last layer and do not carry out sand,
And module placement is dried for 12 hours solidifies second layer shell；Repeat 5 times, complete shell process processed；
S37:The above-mentioned model for making shell is put into dewaxing steam kettle and keeps 160 DEG C of temperature, 20 minutes or so de- is carried out
Wax；The model for having taken off wax is checked, to crackle<The carrying out of 0.5mm is repaired, occur fall in flakes or, split or split
Line>0.5mm situation carries out scrapping processing；
S38:The model for having taken off wax is put into high-temperature roasting furnace and is heated between 900 DEG C -1100 DEG C, a 40-50 minutes left sides are calcined
The right side, burned shell is white or rose color；The molten steel of melting is poured into each shell by the sprue gate of each shell again, poured
Its cooling is stood after the completion of casting；
S39:Turbo blade casting after cooling is first passed through into vibrations hulling machine and removes shell；It will be poured into a mould by flame cutting machine again
Turbo blade in system carries out cutting with running gate system and separated；Being soaked and being rinsed with giant in water makes gas
Releasing agent between fenestra and tungsten filament is completely dissolved, and extracts tungsten filament out, is finally carried out blasting treatment to turbo blade product, is obtained most
Whole turbo blade.
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