CN114850503A - Device and method for repairing blade gas film hole by laser-assisted electric field driven jet deposition - Google Patents
Device and method for repairing blade gas film hole by laser-assisted electric field driven jet deposition Download PDFInfo
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- 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
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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
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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
- 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
- B22F12/50—Means for feeding of material, e.g. heads
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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
- B33Y10/00—Processes of additive manufacturing
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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
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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
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/10—Pre-treatment
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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
- B33Y70/00—Materials specially adapted for additive manufacturing
- B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D1/00—Electroforming
- C25D1/04—Wires; Strips; Foils
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The invention provides a device and a method for repairing a blade gas film hole by laser-assisted electric field driven jet deposition, which comprises the following steps: the electric field driven jet deposition printing equipment comprises a flat electrode for placing an engine and a printing nozzle, wherein the printing nozzle is used for printing the slurry into wires; the laser is used for remelting the wire material and forming a molten pool at the position to be repaired of the blade air film hole; according to the invention, the electric field is used for driving the jet deposition printing equipment to produce and repair the required wire material, then, the wire material is remelted under the action of the laser, and meanwhile, a micro molten pool is formed at the position to be repaired of the blade air film hole, so that the combination of the wire material and the substances in the molten pool can be realized; the method is simple to operate, can repair corroded and damaged gas film holes, ensures that the remelted powder can be captured by a micron-level molten pool, has good forming quality and high forming efficiency, and can realize accurate repair of worn parts to achieve ideal effects.
Description
Technical Field
The invention belongs to the technical field of blade gas film hole repair, and particularly relates to a device and a method for repairing a blade gas film hole by driving jet deposition through a laser auxiliary electric field.
Background
The development level of the aviation manufacturing industry, as a strategic high-tech industry, is a symbol of national comprehensive strength and is one of the important guarantees of national security and the status of the great country. The aircraft engine acts as the "heart" of the aircraft, and its reliability is critical to the proper operation of the aircraft. The turbine blade, whose profile accuracy and surface integrity determine the service performance and service life of the aircraft, is listed as one of the components that are central in the manufacture of aircraft engines. The turbine blade is in severe environments such as centrifugal load, thermal stress, corrosion and the like for a long time, the microstructure parts such as the edge of an air film hole on the blade, the tip of the blade and the like have the defects of cracks, abrasion, fracture damage, corrosion and the like due to erosion corrosion and oxidation corrosion, if the height of the deposit near the surface of the outlet of the air film hole is increased, the cooling efficiency of the air film at the downstream of the hole is greatly reduced, the service life of the turbine blade is further reduced, and the cost for repairing the air film hole of the blade is only about 10 percent of that of the whole blade, so that the research on the repair technology of the air film hole of the turbine blade of the aeroengine is developed, the service life of the blade is favorably prolonged, the manufacturing cost is reduced, and great economic benefits are achieved.
The inventor finds that in order to solve the problem of repairing the blade air film hole, the Chinese patent with the publication number of CN113249728A discloses a method and a device for repairing the hole wall defect of the air film hole, the method and the device mainly comprise the steps of putting a certain length of metal magnetic micro-needle into the air film hole, adding polishing solution, and utilizing a motor to provide power to enable a rotating disc to drive a cylindrical container to rotate to remove blocking impurities or remove the hole wall defect, but the method only can be used for repairing the inner side of the hole wall and cannot be used for repairing the periphery of the hole opening of the air film, and the repairing effect is poor; the invention discloses a repairing method of an air film hole after repairing a damaged turbine blade, which is characterized in that ultrafast laser is used for repairing the air film hole to be repaired, a rotary cutting layer-by-layer scanning hole making mode is adopted, circular rotary cutting hole repairing is carried out, redundant coatings are removed, and the air film hole to be repaired is processed into the air film hole meeting requirements.
Disclosure of Invention
The invention aims to solve the problems and provides a device and a method for repairing a blade gas film hole by laser-assisted electric field driven jet deposition.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a device for repairing a blade film hole by laser-assisted electric field-driven spray deposition, comprising:
the electric field driven jet deposition printing equipment comprises a flat electrode for placing an engine and a printing nozzle, wherein the printing nozzle is used for printing the slurry into wires;
the laser is used for remelting the wire material and forming a molten pool at the position to be repaired of the blade air film hole; and (4) combining the remelted wire with substances in the molten pool to repair the blade air film hole.
Furthermore, the flat electrode is provided with a high-voltage power supply.
Furthermore, the printing nozzle is communicated with a discharge hole at the lowest end of the printing spray head and is positioned right above the flat plate electrode, and the printing nozzle is vertical to the flat plate electrode.
Further, the printing nozzle is connected with the XYZ three-axis motion platform through a connecting frame.
In a second aspect, the present invention further provides a method for repairing a blade film hole by laser-assisted electric field driven spray deposition, where the apparatus for repairing a blade film hole by laser-assisted electric field driven spray deposition as described in the first aspect is used, and includes:
printing the slurry into a wire material by using an electric field driven jet deposition technology;
remelting the wire under the irradiation of laser beams, and forming a molten pool at the position to be repaired of the blade gas film hole;
and (4) combining the remelted wire with substances in the molten pool to repair the blade air film hole.
Further, when the slurry is printed into a wire, high voltage is applied, inductive charges are formed on the surface of the slurry liquid drop through self-induction, and the conical jet flow is induced by repulsion between the charges to form the wire.
Further, the high voltage is a direct current high voltage, a pulse high voltage or an alternating current high voltage; the range of the direct current high voltage is 0 KV-5 KV; the range of the pulse high voltage is 0KV to +/-4 KV, and the range of the pulse frequency is 0Hz to 3000 Hz; the AC high voltage range is 0 KV- +/-4 KV; the moving speed of the nozzle is 0 to 20 μm/s.
Further, the laser parameters of the emitted laser beam are power: 0-1500W, spot diameter: 10-20 μm, and a scanning speed of 10-30 μm/s.
Further, the slurry includes a nickel-base superalloy metal powder and a binder.
Further, the slurry comprises nickel-based superalloy metal powder, nano ceramic powder and a binder.
Further, the high energy density of the laser beam causes the binder in the wire to vaporize and the metal powder to melt; meanwhile, the high energy density of the laser beam discharges micropores in the wire.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the electric field is used for driving the jet deposition printing equipment to produce and repair the required wire material, then, the wire material is remelted under the action of the laser, and meanwhile, a micro molten pool is formed at the position to be repaired of the blade air film hole, so that the combination of the wire material and the substances in the micro molten pool can be realized; the method is simple to operate, the corroded and damaged gas film hole can be repaired, the remelted powder can be captured by the micro-melting pool in the micron level, the forming quality is good, the forming efficiency is high, and the accurate repair of the worn part can be realized to achieve an ideal effect;
2. at present, the laser additive manufacturing technology capable of realizing repair is only a laser three-dimensional forming technology based on the technical characteristics of powder feeding, but is affected by the powder convergence precision in the synchronous powder feeding process, so that powder is difficult to capture by a micro-molten pool at a micron level, the forming quality is poor, and the forming efficiency is low; in the embodiment, the powder is prepared into slurry, the micro-nano 3D printing technology is sprayed and deposited through electric field driving, the preparation of 'micro-wire materials' is realized, and then laser repair is carried out under the action of laser beams, so that the accurate repair of the worn part can be realized.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the present embodiments, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present embodiments and together with the description serve to explain the present embodiments without unduly limiting the present embodiments.
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
The specific implementation mode is as follows:
the invention is further described with reference to the following figures and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Interpretation of terms:
electric field driven spray deposition: the micro-jet forming 3D printing forming technology is based on self-excitation electrostatic induction electric field driving.
Aeroengine blade gas film hole: the circular holes are regularly arranged on the surface of the turbine blade of the aero-engine, so that a layer of cooling air film is formed on the surface of the turbine blade and is used for cooling the turbine blade.
Micro-wire material: is a microstructure printed by electric field driven jet deposition, and the shape of the microstructure is a filiform.
Example 1:
the air film holes are circular holes (the diameter of each circular hole is 20-800 microns) with a certain arrangement rule on the surface of the turbine blade, and are used for taking away partial heat in the blade through heat convection enhancement by extracting cold air from the air compressor, and then the cold air flows out from the blade body or the air film holes in the end wall of the turbine blade, and the cold air can be adhered to the wall surface to form a cold air layer with lower temperature due to the flowing effect, so that a good high-temperature isolation effect is achieved, the blade is not ablated by high-temperature gas, and the cooling effect of the turbine blade is further achieved. The cooling design of the turbine blade film hole can reduce the wall thickness of the blade, reduce the weight, reduce the cost by using the existing material, and improve the temperature before the vortex, thereby improving the thrust-weight ratio and prolonging the service life of parts.
In order to solve the problem of repairing an aero-engine blade film hole, in the embodiment, the device for repairing the blade film hole by driving jet deposition through the laser auxiliary electric field is provided, and comprises electric field driving jet deposition printing equipment and a laser;
the electric field driven jet deposition printing equipment comprises a flat plate electrode for placing an engine and a printing nozzle, wherein the printing nozzle is used for printing the slurry into wires;
the laser is used for remelting the wire material and forming a micro molten pool at the position to be repaired of the blade air film hole; and (4) combining the remelted wire with substances in the micro-melting pool to repair the air film hole of the blade.
The electric field driven jet deposition printing equipment has the effects that the micro-nano 3D printing technology driven by the electric field is utilized to realize the forming of micron-scale micro-wires, the high voltage is applied between the nozzle and the substrate (or the high voltage is only applied at the substrate, namely the single potential), the inductive charges are formed on the surface of the slurry liquid drop at the outlet of the nozzle through self-induction, and the repulsion between the charges induces the formation of cone jet flow, so that the micro-wires with the width of 10 mu m or even thinner are printed. It should be noted that, in this embodiment, the slurry may include nickel-base superalloy metal powder and a binder; the slurry is prepared from metal powder and a binder according to a certain proportion, and specifically, the proportion of the nickel-based superalloy metal powder to the binder can be as follows: 65-80 wt% of nickel-based superalloy metal powder, 8-25 wt% of a binder, and 5-15 wt% of a solvent, the nickel-based superalloy metal powder being available in existing products; in other embodiments, the slurry may include nickel-based superalloy metal powder, nano ceramic powder, and a binder, and the nickel-based superalloy metal powder, nano ceramic powder, and binder may be mixed in a ratio of: 60-70 wt% of nickel-based superalloy metal powder, 5-10 wt% of ceramic powder, 8-25 wt% of adhesive and 5-15 wt% of solvent.
The laser is used for remelting under the irradiation of laser beams based on a micro-wire feeding laser three-dimensional forming technology and an electric field driven jetting deposition micro-nano 3D printing forming micro-wire; on the one hand, the high energy density of the laser vaporizes the binder in the microwire material and melts the metal at the same time, and the micropores and the like in the microwire material are discharged under the action of Marangoni (Marangoni) convection to form a compact structure. On the other hand, the high energy density of the laser beam can form a micro-molten pool on the substrate, so that the 'micro-wire material' is metallurgically bonded with the substrate, and the bonding strength requirement is met.
The main contents of this embodiment are as follows:
the electric field driven jet deposition printing equipment adopts a single flat plate electrode electric field driven multi-nozzle jet deposition micro-nano 3D printing device and comprises a printing nozzle module, a printing nozzle module made of any material, a printing substrate made of any material, a flat plate electrode, a printing platform, a signal generator, a high-voltage power supply, a feeding module, a precision back pressure control module, an XYZ three-axis precision motion platform, a positive pressure gas path system, an observation positioning module, an UV curing module, a laser range finder, a base, a connecting frame, a first adjustable support, a second adjustable support, a third adjustable support and the like;
fixing a printing platform on a base, wherein a flat plate electrode is positioned on the printing platform, the output end of a signal generator is connected with a high-voltage power supply, one end of the high-voltage power supply is connected with the flat plate electrode, and the other end of the high-voltage power supply is grounded; the printing substrate is positioned on the flat plate electrode, each printing nozzle in the printing nozzle module is connected with a discharge port at the lowest end of a corresponding printing nozzle in the printing nozzle module and is positioned right above the flat plate electrode, and each printing nozzle in the printing nozzle module is vertical to the flat plate electrode; each feeding module in the feeding module is communicated with the lower half part of the corresponding printing spray head of the printing spray head module, a back pressure control module in the precise back pressure control module is communicated with the top part of the corresponding printing spray head in the printing spray head module, and the positive pressure gas path system is communicated with each back pressure control module in the precise back pressure control module; the printing nozzle module is connected with an XYZ three-axis precision motion platform through a connecting frame, the observation positioning module is connected with a first adjustable support, and the first adjustable support is fixedly connected with the connecting frame; the laser range finder is connected with the second adjustable support, and the second adjustable support is fixedly connected with the connecting frame; the UV curing module is connected with a third adjustable support, and the third adjustable support is fixedly connected with the connecting frame.
The signal generator is used for outputting various waveforms, outputting frequency of 0 MHz-1 MHz, adjusting output peak voltage, bias voltage, frequency and duty ratio, and printing dots or lines according to requirements. The high-voltage power supply is set to be in an amplifier mode, the signal generator is set to have the frequency of 800Hz, the peak value of 7V, the bias voltage of 0V and the duty ratio of 50 percent;
the observation positioning module is used for observing and positioning the position of the printing nozzle relative to the air film hole in the vertical direction, and an industrial camera or a high-resolution CCD camera can be used;
the UV curing module is used for rapidly curing the printed micro-wires, and an LED or a high-pressure mercury lamp can be used here;
the laser range finder is used for realizing accurate measurement of the printed microfilament and the air film hole;
in this embodiment, the process parameter range of the electric field driven jet deposition printing may be set as: the inner diameter size range of the printing nozzle is 0.1-300 mu m, the thickness range of the flat plate electrode is 0.5-30 mm, the high-voltage power supply can output direct-current high voltage, alternating-current high voltage or pulse high voltage, the direct-current high voltage range is 0 KV-5 KV, the output pulse direct-current voltage range is 0 KV-4 KV and is continuously adjustable, the output pulse frequency range is 0 Hz-3000 Hz and is continuously adjustable, the alternating-current high voltage range is 0 KV-4 KV, and the moving speed of the nozzle is 0-20 mu m/s.
The position of the turbine engine blade is adjusted, the nozzle is placed right above the damaged and corroded air film hole of the turbine blade, and the 'microfilament material' is printed around the air film hole.
The method is suitable for a solid laser, and the range of the cladding process parameters can be set as follows: power: 0-1500W, spot diameter: 10-20 μm, and a scanning speed of 10-30 μm/s.
Adjusting the position of a laser, jetting and depositing micro-nano 3D printing formed 'micro-wires' based on electric field driving, and remelting under the irradiation of laser beams; wherein, the high energy density of the laser can vaporize the binder in the micro-wire material and melt the metal at the same time, and simultaneously discharge the micro-pores and the like in the micro-wire material under the convection action of Marangoni (Marangoni) to form a compact tissue; in addition, a micro molten pool is formed on the substrate by the high energy density of the laser beam, so that the 'micro wire material' is metallurgically bonded with the substrate, the bonding strength requirement is met, and the repairing effect is achieved.
Example 2:
the embodiment provides a method for repairing a blade film hole by laser-assisted electric field driven spray deposition, which adopts the device for repairing a blade film hole by laser-assisted electric field driven spray deposition described in embodiment 1, and comprises the following steps:
printing the slurry into a wire material by using an electric field driven jet deposition technology;
remelting the wire under the irradiation of a laser beam, and forming a micro molten pool at the position to be repaired of the blade gas film hole;
and (4) combining the remelted wire with substances in the micro-melting pool to repair the air film hole of the blade.
In this embodiment, when the slurry is printed into a wire, a high voltage is applied, an induced charge is formed on the surface of the slurry droplet by self-induction, and the repulsive force between the charge induces the formation of a cone jet to obtain the wire.
In this embodiment, the high voltage is a dc high voltage, a pulse high voltage, or an ac high voltage; the range of the direct current high voltage is 0 KV-5 KV; the range of the pulse high voltage is 0KV to +/-4 KV, and the range of the pulse frequency is 0Hz to 3000 Hz; the AC high voltage range is 0 KV- +/-4 KV; the moving speed of the nozzle is 0 to 20 μm/s.
In this embodiment, the laser parameters for emitting the laser beam are power: 0-1500W, spot diameter: 10-20 μm, and a scanning speed of 10-30 μm/s.
In this embodiment, the slurry includes a nickel-base superalloy metal powder and a binder.
In this embodiment, the slurry includes the nickel-based superalloy metal powder, a nano-ceramic powder, and a binder.
In this embodiment, the high energy density of the laser beam causes the binder in the wire to vaporize and the metal powder to melt; meanwhile, the high energy density of the laser beam discharges micropores in the wire.
Example 3:
different from the embodiment 2, in the embodiment, the process parameters of the electric field driven jet deposition 3D printing are selected as follows: the inner diameter of the printing nozzle is 100 μm, the moving speed of the nozzle is 20 μm/s, and the DC high voltage is 2 KV. And then adjusting the position of the turbine engine blade, placing the nozzle right above the damaged and corroded gas film hole of the turbine blade, and printing a 'microfilament material' around the gas film hole. Then, a laser for outputting continuous laser is adopted, and the process parameters are as follows: the power is 300W, the spot diameter is 2 μm, and the scanning speed is 10 μm/s. The position of a laser is adjusted, the micro-wire material formed by micro-nano 3D printing is ejected and deposited based on electric field driving, remelting occurs under the irradiation of laser beams, and a micro-molten pool is formed on the substrate by the high energy density of the laser beams, so that the micro-wire material is metallurgically bonded with the substrate, and the bonding strength requirement is met. Thereby achieving the repairing effect.
Example 4:
unlike embodiments 2 and 3, in this embodiment, the process parameters of the electric field driven jet deposition 3D printing are selected: the inner diameter of the printing nozzle is 100 μm, the moving speed of the nozzle is 20 μm/s, and the DC high voltage is 2 KV. And then adjusting the position of the turbine engine blade, placing the nozzle right above the damaged and corroded gas film hole of the turbine blade, and printing a 'microfilament material' around the gas film hole. Then, a laser for outputting continuous laser is adopted, and the process parameters are as follows: the power is 500W, the spot diameter is 2 μm, and the scanning speed is 15 μm/s. The position of a laser is adjusted, the micro-wire material formed by micro-nano 3D printing is ejected and deposited based on electric field driving, remelting occurs under the irradiation of laser beams, and a micro-molten pool is formed on the substrate by the high energy density of the laser beams, so that the micro-wire material is metallurgically bonded with the substrate, and the bonding strength requirement is met. Thereby achieving the repairing effect.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.
Claims (10)
1. Device in blade air film hole is restoreed in supplementary electric field drive of laser spraying deposition, its characterized in that includes:
the electric field driven jet deposition printing equipment comprises a flat electrode for placing an engine and a printing nozzle, wherein the printing nozzle is used for printing the slurry into wires;
the laser is used for remelting the wire material and forming a molten pool at the position to be repaired of the blade gas film hole; and (4) combining the remelted wire with substances in the molten pool to repair the blade air film hole.
2. The device for repairing blade film holes by laser-assisted electric field driven jet deposition according to claim 1, wherein the flat electrode is provided with a high-voltage power supply.
3. The device for repairing the blade film hole by laser-assisted electric field driven jet deposition as claimed in claim 1, wherein the printing nozzle is communicated with a discharge hole at the lowest end of the printing nozzle and is positioned right above the flat plate electrode, and the printing nozzle is perpendicular to the flat plate electrode.
4. The device for repairing the gas film hole of the blade by the laser-assisted electric field driven jet deposition as claimed in claim 1, wherein the printing nozzle is connected with an XYZ three-axis motion platform through a connecting frame.
5. The method for repairing the blade gas film hole by laser-assisted electric field driven jet deposition is characterized in that the device for repairing the blade gas film hole by laser-assisted electric field driven jet deposition according to any one of claims 1 to 4 is adopted, and comprises the following steps:
printing the slurry into a wire material by using an electric field driven jet deposition technology;
remelting the wire under the irradiation of laser beams, and forming a molten pool at the position to be repaired of the blade gas film hole;
and (4) combining the remelted wire with substances in the molten pool to repair the blade air film hole.
6. The method for repairing blade air film holes by laser-assisted electric field driven jet deposition as claimed in claim 5, wherein when the slurry is printed into wires, a high voltage is applied, induced charges are formed on the surface of slurry droplets through self-induction, and the repulsion between the charges induces the formation of cone jet to obtain the wires.
7. The method for repairing a gas film hole of a blade by laser-assisted electric field driven spray deposition according to claim 6, wherein the high voltage is a direct current high voltage, a pulse high voltage or an alternating current high voltage; the range of the direct current high voltage is 0 KV-5 KV; the range of the pulse high voltage is 0KV to +/-4 KV, and the range of the pulse frequency is 0Hz to 3000 Hz; the AC high voltage range is 0 KV- +/-4 KV; the moving speed of the nozzle is 0 to 20 μm/s.
8. The method for repairing a blade film hole by laser-assisted electric field driven spray deposition as claimed in claim 5, wherein the laser parameters for emitting the laser beam are power: 0-1500W, spot diameter: 10-20 μm, and a scanning speed of 10-30 μm/s.
9. The method for repairing a blade film hole by laser-assisted electric field driven spray deposition as claimed in claim 5, wherein the slurry comprises nickel-base superalloy metal powder and a binder;
or, the slurry comprises nickel-based superalloy metal powder, nano ceramic powder and a binder.
10. The laser-assisted electric field driven spray deposition method for repairing a blade film hole as claimed in claim 9, wherein the high energy density of the laser beam vaporizes the binder in the wire and melts the metal powder; meanwhile, the high energy density of the laser beam discharges micropores in the wire.
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