CN109795673A - A kind of unmanned plane rotor surface micro-structure drag reduction film and its manufacturing method - Google Patents
A kind of unmanned plane rotor surface micro-structure drag reduction film and its manufacturing method Download PDFInfo
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- CN109795673A CN109795673A CN201910068662.5A CN201910068662A CN109795673A CN 109795673 A CN109795673 A CN 109795673A CN 201910068662 A CN201910068662 A CN 201910068662A CN 109795673 A CN109795673 A CN 109795673A
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- 238000000520 microinjection Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims description 45
- 238000013461 design Methods 0.000 claims description 19
- 239000002994 raw material Substances 0.000 claims description 4
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- 239000002985 plastic film Substances 0.000 abstract description 4
- 229920006255 plastic film Polymers 0.000 abstract description 4
- 238000007796 conventional method Methods 0.000 abstract description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/16—Blades
- B64C11/18—Aerodynamic features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/46—Blades
- B64C27/467—Aerodynamic features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64F—GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT; DESIGNING, MANUFACTURING, ASSEMBLING, CLEANING, MAINTAINING OR REPAIRING AIRCRAFT, NOT OTHERWISE PROVIDED FOR; HANDLING, TRANSPORTING, TESTING OR INSPECTING AIRCRAFT COMPONENTS, NOT OTHERWISE PROVIDED FOR
- B64F5/00—Designing, manufacturing, assembling, cleaning, maintaining or repairing aircraft, not otherwise provided for; Handling, transporting, testing or inspecting aircraft components, not otherwise provided for
- B64F5/10—Manufacturing or assembling aircraft, e.g. jigs therefor
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to drag reduction technical field of membrane, a kind of unmanned plane rotor surface micro-structure drag reduction film and its manufacturing method are provided, it include: separation layer, and, microstructured layers set on separation layer side, microstructured layers surface are equipped with microchannels arranged in parallel, and microchannels are V-shaped or rectangle or U-shaped, the width S of microchannels is 0.02mm~0.4mm, and the height H of microchannels is 0.05mm~0.3mm.Drag reduction film passes through the micro- injection molding or hot-forming of mold core, it just can control the shape of microchannels on drag reduction film by the shape of the microchannels on control mold core, so that the processing quality and dimensional accuracy of microchannels are high, controlled shape, larger area should be had by meeting the molding of drag reduction film surface, summit is sharp, requirement with high accuracy, simultaneously, using micro injection molding or it is hot-forming by the way of, the mode that opposite conventional method directly processes film, thickness error influence caused by formed precision of plastic film itself can also be eliminated, enable the mass production of the drag reduction film high quality.
Description
Technical field
The present invention relates to for drag reduction technical field of membrane, be provided in particular in a kind of unmanned plane rotor surface micro-structure drag reduction film and
Its manufacturing method.
Background technique
Currently, unmanned air vehicle technique development is swift and violent.Comprehensive it can consider when solving the problems, such as unmanned plane duration performance, in addition to
Battery performance is promoted, can also be started with from the aerodynamic characteristic of propeller or rotor or wing.
The blade of propeller is high-intensitive, high-modulus carbon fiber structural at present, and light weight hardness is high, is not easy on its surface
Processing micro structure, it is therefore desirable to special drag reduction mode.
Common drag reduction method in practical applications has: optimization design, polymer coating (or injection), flexible wall surface, wall
The methods of face heating and air curtain shielding.Although these methods are feasible in principle, drag-reduction effect is also obvious, in large size
In application, technical problem is difficult to capture on spacecraft, some need largely changes spacecraft structure or shape, some need
It is equipped with some special ancillary equipments.
There is correlative study to show that sticking microstructure film in aerofoil surface can reduce resistance, this method uses simply,
Easy to maintain, easy disassembling does not change wing shape.Drag reduction pad pasting can effectively reduce aircraft turbulent skin friction resistance, be to subtract
Hinder the new concept that research field proposes.
The key of drag reduction film drag reduction technology is the manufacturing technology of drag reduction film, and the key of manufacturing technology is that drag reduction film surface is micro-
The molding of fine groove.Aerodynamic studies show that the structure of this minute groove can be there are many form.According to air force
Requirement, the summit for forming groove is sharp as far as possible, and otherwise drag-reduction effect is bad, answers the tolerance of groove width S and height h
Within 0.005mm, while to avoid the piece when aircraft outer surface sticks excessive, the breadth of drag reduction film cannot be too small.
Currently, production very low power can actually be usually used in making there are many method, such as curtain coating, printing, cold rolling, roll shape etc.
Make groove is extruded film roll shape method and two kinds of hot pressing.But both methods, larger area, summit have been provided in surface forming
Sharply, highly accurate tiny groove, it is also relatively difficult, so that the drag-reduction effect of drag reduction film is bad.
Summary of the invention
The purpose of the present invention is to provide a kind of unmanned plane rotor surface micro-structure drag reduction films, it is intended to solve in the prior art
The bad technical problem of wing drag-reduction effect.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of unmanned plane rotor surface micro-structure drag reduction film,
It include: separation layer, and, the microstructured layers set on the separation layer side, the microstructured layers surface is equipped with arranged in parallel
Microchannels, the microchannels are V-shaped or rectangle or U-shaped, and the width S of the microchannels is 0.02mm~0.4mm, described
The height H of microchannels is 0.05mm~0.3mm.
Preferably: the microchannels are V-shaped, and the corner angle β of the microchannels is 50 °~60 °.
Preferably: the corner angle β of the microchannels is 55 °.
Preferably: the separation layer is additionally provided with glue-line far from the side of the microstructured layers.
Preferably: the microstructured layers with a thickness of 0.15mm~0.4mm, the separation layer with a thickness of 0.11mm~
0.12mm, the glue-line with a thickness of 0.05mm~0.13mm.
The object of the invention is also to provide a kind of manufacturing methods of unmanned plane rotor surface micro-structure drag reduction film, including with
Lower processing step:
S1, the microchannels design requirement according to drag reduction film, micro- tip of grinding wheel is trimmed to needed for the microchannels
The shape wanted；
S2, the design requirement according to microchannels process the grinding wheel one by one on the surface of mold core a plurality of parallel
Microchannels, until the quantity of the microchannels reaches design requirement；
S3, the mold core in step S2 with microchannels is put into molding machine, the raw material of investment production drag reduction film,
And the micro-structure drag reduction of design requirement is produced with microchannels and met by micro injection molding or hot-forming mode
Film；
S4, the side for deviating from microchannels on the drag reduction film in step S3 is coated into glue-line, it is by glue-line that drag reduction film is tight
It is attached to unmanned plane rotor surface.
Preferably: before carrying out step S1, according to the design requirement of drag reduction film, by the shape of the mold core be fabricated to
The drag reduction film shape of design requirement is adapted.
Preferably: in the step S1, the grinding wheel is super-abrasive grinding wheel, and the dressing method uses dry contact
Electric discharge, the revolving speed N of the grinding wheel are 2000~5000 revs/min, the normal direction feeding depth h of the grinding wheel be 0.001mm~
0.005mm, the feed speed V of the grinding wheel are 100~1000mm/ points.
Preferably: in the step S2, the microchannels are V-shaped or rectangle or U-shaped, the width of the microchannels
S is 0.02mm~0.4mm, and the height H of the microchannels is 0.05mm~0.3mm.
Preferably: the microchannels are V-shaped, and the corner angle β of the microchannels is 50 °~60 °.
Beneficial effects of the present invention:
A kind of unmanned plane rotor surface micro-structure drag reduction film and its manufacturing method, drag reduction film provided by the invention pass through mold core
Micro- injection molding or hot-forming just can control the shape of microchannels on drag reduction film by the shape of the microchannels on control mold core
Shape, so that the processing quality of microchannels and dimensional accuracy height, controlled shape, larger face should be had by meeting the molding of drag reduction film surface
Product, summit is sharp, requirement with high accuracy, meanwhile, using micro injection molding or it is hot-forming by the way of, opposite conventional method is to thin
The mode that film is directly processed, moreover it is possible to the thickness error influence caused by formed precision for eliminating plastic film itself, so that this subtracts
Hinder the mass production of film energy high quality.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of structural schematic diagram of unmanned plane rotor surface micro-structure drag reduction film provided in an embodiment of the present invention；
Fig. 2 is a kind of process signal of the manufacturing method of unmanned plane rotor surface micro-structure drag reduction film in the embodiment of the present invention
Figure；
Fig. 3 is the machining sketch chart that medium plain emery wheel of the embodiment of the present invention processes hard alloy mold core；
Fig. 4 is the injection moulding process schematic diagram that injected plastics material and hard alloy mold core form drag reduction film in the embodiment of the present invention；
Fig. 5 is drag reduction film and rotor burst schematic diagram in the embodiment of the present invention；
Fig. 6 is that drag reduction film is close to the schematic diagram on the rotor of part in the embodiment of the present invention.
Appended drawing reference: 1, drag reduction film；11, separation layer；12, microstructured layers；121, microchannels；2, glue-line；3, grinding wheel；
31, micro- tip；4, hard alloy mold core；5, rotor.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " length ", " width ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
It please refers to shown in Fig. 1 and Fig. 6, a kind of unmanned plane rotor surface micro-structure drag reduction film, which includes: isolation
Layer 11, and, the microstructured layers 12 set on 11 side of separation layer, 12 surface of microstructured layers, which is equipped with, arranges alternate microchannels
121, microchannels 121 are V-shaped or rectangle or U-shaped, the width S of microchannels 121 are 0.02mm~0.4mm, microchannels 121
Height H be 0.05mm~0.3mm, which has good drag-reduction effect because surface is with microchannels 121, when
After drag reduction film 1 is attached to 5 surface of unmanned plane rotor, resistance suffered when 5 flight of rotor can be effectively reduced, to can be reduced nothing
Man-machine energy consumption, this improves the cruising abilities of unmanned plane.
Specifically, in the present embodiment, microchannels 121 are preferably V-shaped, and the corner angle β of microchannels 121 is 50 °
~60 °.A plurality of microchannels 121 are wave-shaped on 12 surface of microstructured layers.
Specifically, in the present embodiment, corner angle β is 55 °, and the drag-reduction effect of such drag reduction film 1 is more preferable.
Preferably: in the present embodiment, being additionally provided with glue-line 2 far from the side of microstructured layers 12 in separation layer 11, glue-line 2 is used
It is tightly attached on rotor 5 in by drag reduction film 1.
Specifically, in the present embodiment, microstructured layers 12 with a thickness of 0.15mm~0.4mm, separation layer 11 with a thickness of
0.11mm~0.12mm, glue-line 2 with a thickness of 0.05mm~0.13mm.
Further, in the present embodiment, the width S of microchannels 121 is 0.05mm~0.1mm, microchannels 121
Height H be 0.12mm~0.2mm.
In the present embodiment, drag reduction film 1 is made of polymer material, if thermoplastic plastic's material is made, specifically, is subtracted
Resistance film 1 is made of acrylic material.
As shown in Fig. 2-Fig. 6, the present embodiment also provides a kind of production method of unmanned plane rotor surface micro-structure drag reduction film,
Including following processing step:
S1,121 design requirement of microchannels according to drag reduction film 1, are trimmed to microchannels for micro- tip 31 of grinding wheel 3
Shape required for 121；
S2, the design requirement according to microchannels process grinding wheel 3 one by one on the surface of mold core 4 a plurality of parallel micro-
Type groove 121, until the quantity of microchannels 121 reaches design requirement；
S3, the mold core 4 in step S2 with microchannels 121 is put into molding machine, the original of investment production drag reduction film
Material, and produced by micro injection molding or hot-forming mode with microchannels 121 and meet the micro- of design requirement
Structure drag reduction film 1；
S4, the side for deviating from microchannels 121 on the drag reduction film 1 in step S3 is coated into glue-line 2, will be subtracted by glue-line 2
Resistance film 1 is tightly attached to 5 surface of unmanned plane rotor.
Before step S2, the shape of microchannels 121 is first determined, in the present embodiment, microchannels 121 are V-shaped,
Microchannels 121 can be in rectangle or U-shaped in other embodiments.Therefore, micro- tip 31 of grinding wheel 3 is trimmed to V-type, accomplished
During micro- tip 31, needs constantly to detect micro- tip 31 and whether modify and meet design requirement.In the present embodiment, grinding wheel
3 are fixed on the first numerical control machine tool, and grinding wheel 3 with the grinding wheel spindle on the second numerical control machine tool by being modified.
In the present embodiment, mold core 4 uses hard alloy mold core or mould steel mold core, preferably hard alloy mold core, benefit
Micro- grinding is carried out on the surface of hard alloy mold core 4 with grinding wheel 3, is completed the process between being arranged after a microchannels 121 etc.
Every spacing parameter, then repeat processing microchannels 121, in this process, can the parameter to microchannels 121 rationally adjusted
It is whole, the different hard alloy mold core of multiple parameters is produced, for verifying influence of the different parameters to 1 drag-reduction effect of drag reduction film.
In the present embodiment, molding machine can be micro injection molding machine or heat pressing forming machines, and drag reduction film 1 is molded by micro-
Type machine injection molding, or hot-forming by heat pressing forming machines, the production of the drag reduction film 1 have a stable molding, and precision is high, can be big
The advantages of batch production.In the present embodiment, the raw material of drag reduction film 1 are polymer material, such as thermoplastic plastic's material, specifically
Ground, the raw material of drag reduction film 1 are acrylic powder material.
It after the drag reduction film 1 made is tightly attached on rotor 5, can make a flight test to unmanned plane, test drag-reduction effect,
During this this, the drag-reduction effect of 121 parameter of microchannels of different parameters can be obtained, wanted to facilitate according to different flight
It asks, selects different drag reduction films 1.
A kind of manufacturing method of unmanned plane rotor surface micro-structure drag reduction film provided by the invention, drag reduction film 1 pass through mold core 4
Injection molding is hot-forming, just can control the shape of microchannels 121 on drag reduction film 1 by the shape of the microchannels 121 on mold core 4
Shape so that the processing quality of microchannels 121 and dimensional accuracy are high, controlled shape, meet 1 surface forming of drag reduction film should have compared with
Large area, summit be sharp, requirement with high accuracy, meanwhile, using injection molding or it is hot-forming by the way of, opposite conventional method is to film
The mode directly processed, moreover it is possible to the thickness error influence caused by formed precision for eliminating plastic film itself, so that the drag reduction
The mass production of film energy high quality.
Specifically, before carrying out step S1, according to the design requirement of drag reduction film 1, by hard alloy mold core or mold
The shape of punching block core is fabricated to shape compatible with drag reduction film 1.The purpose done so is, makes hard alloy mold core or mold
The drag reduction film 1 that punching block core forms out directly meets requirement.Certainly, in other embodiments, hard alloy mold core and mould
The shape for having punching block core can be different from the shape of drag reduction film 1, subsequent to carry out being trimmed to required shape to drag reduction film 1 after molding again
The drag reduction film 1 of shape.
Specifically, in step sl, first grinding wheel 3 is mounted on the grinding wheel spindle of the first machining tool, then core 4 is fixed again
On the workbench of the first machining tool, grinding wheel 3 is then made to carry out micro- grinding on the surface of mold core 4, process first it is miniature
Groove 121；After completing first microchannels 121, grinding wheel 3 is set to retract pre-determined distance along normal orientation, and along default mill
Path is cut to continue to process the second microchannels 121；Above-mentioned process is repeated, until completing item required for microchannels 121
Number.
Specifically: in step sl, grinding wheel 3 uses super-abrasive grinding wheel, wherein super-abrasive grinding wheel is cubic boron nitride
Material or diamond are made.Wherein, dressing method uses dry contact electric discharge, wherein the revolving speed N of grinding wheel 3 is 2000
~5000 revs/min, the normal direction feeding depth h of grinding wheel 3 is 0.001mm~0.005mm, the feed speed V of grinding wheel 3 is 100~
1000mm/ points, has the advantages that processing is steady in this way, machining accuracy has been effectively ensured.
Specifically, dry contact electric discharge (ECD, Electro-Contact Discharge) is to utilize 3 surface of grinding wheel point
The chip and 3 metallic bond pulsing spark discharge of grinding wheel that micro- abrasive grain cutting copper electrode of cloth is rolled, gradually micro- removal
Metallic bond realizes that high efficiency carries out dressing finishing to grinding wheel 3.
Preferably: in step s 2, the width S of microchannels 121 is 0.02mm~0.4mm, the height of microchannels 121
H is 0.05mm~0.3mm, and the corner angle β of microchannels 121 is 50 °~60 °.Specifically, corner angle β is preferably 55 °,
This results in the drag-reduction effect of microchannels 121 is best.
Specifically, in step sl, grinding wheel 3 is rotated around the grinding wheel spindle of the second lathe for machining, and grinding wheel 3 is along default mill
The dresser cut on path and the second lathe for machining carries out opposite grinding finishing, and the front end face at micro- tip 31 of grinding wheel 3 is repaired
It is made into required specific shape.
Preferably: in step s3, wherein micro injection molding machine uses BABYPLAST micro injection molding machine, micro- to be molded into
Type machine has mold temperature control cabinet and hydraulic water cooler bin, for controlling molding and the cooling efficiency of drag reduction film 1, improves production
Efficiency.
In the present embodiment, injected plastics material is acrylic powder.Mold core 4 is made of mould steel or cemented carbide material, is had
Have the advantages that hardness is high, precision is high, not easy to wear and easy cleaning
The mold core 4 of micro array structure provided by the invention with microchannels 121 is trimmed by micro- tip 31
The rake face of grinding wheel 3 carries out micro- grinding in face of the surface of mold core 4, to process on the surface of mold core 4 parallel equidistant
Microchannels 121, then the mold core 4 processed is put into micro injection molding machine, is molded with acrylic powder injected plastics material
Molding obtains drag reduction film 1, and the microchannels 121 on drag reduction film 1 are engraved on 121 structure of microchannels on 4 surface of mold core again, so that subtracting
Processing quality and the dimensional accuracy for hindering the microchannels 121 on film 1 are high, and controlled shape, meeting 1 surface forming of drag reduction film should have
Larger area, summit be sharp, highly accurate requirement.1 manufacturing method of drag reduction film provided by the invention has dissemination, can be with
It is generalized to Large Spacecraft, passenger airplane etc..
Meanwhile the manufacturing method of drag reduction film 1 of the invention, micro injection molding method is used in process, changes tradition side
The mode directly processed in method to film eliminates error influence caused by formed precision of plastic film thickness itself；?
Size adjustable is modified at micro- tip 31 of grinding wheel 3 in structure, has optimization space, in 121 parameter of microchannels for changing mold core 4
When, 1 breadth of drag reduction film molded can be made larger, with sharp drag reduction technology under the premise of guaranteeing machining accuracy
Implementation；On mold cavity material, in addition to general intensity, rigidity requirement, material should also have even tissue, densification, nothing
Impurity, the excellent processing performance such as good corrosion resistance.The metal fillings in processing of mold core 4 is easy to remove completely, avoids because of residue
It blocks mold and causes the microchannels 121 molded in disconnection phenomenon.
Micro injection molding machine by mold temperature control cabinet and the hydraulic water cooler bin heating easy to accomplish to drag reduction film 1 and
Cooling, film used in drag reduction film 1 can also be thermoplastic film, and molding uses hot-forming and cooling and shaping technique,
Heating and cooling rate have an impact to Forming Quality and efficiency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of unmanned plane rotor surface micro-structure drag reduction film characterized by comprising separation layer, and, it is set to the isolation
The microstructured layers of layer side, the microstructured layers surface are equipped with microchannels arranged in parallel, and the microchannels are V-shaped or square
Shape or U-shaped, the width Ss of the microchannels are 0.02mm~0.4mm, the height H of the microchannels be 0.05mm~
0.3mm。
2. a kind of unmanned plane rotor surface micro-structure drag reduction film according to claim 1, it is characterised in that: the miniature ditch
Slot is V-shaped, and the corner angle β of the microchannels is 50 °~60 °.
3. a kind of unmanned plane rotor surface micro-structure drag reduction film according to claim 2, it is characterised in that: the miniature ditch
The corner angle β of slot is 55 °.
4. a kind of unmanned plane rotor surface micro-structure drag reduction film according to claim 3, it is characterised in that: the separation layer
Side far from the microstructured layers is additionally provided with glue-line.
5. a kind of unmanned plane rotor surface micro-structure drag reduction film according to claim 4, it is characterised in that: the micro-structure
Layer with a thickness of 0.15mm~0.4mm, the separation layer with a thickness of 0.11mm~0.12mm, the glue-line with a thickness of
0.05mm~0.13mm.
6. a kind of manufacturing method of unmanned plane rotor surface micro-structure drag reduction film, which is characterized in that including following processing step:
S1, the microchannels design requirement according to drag reduction film, micro- tip of grinding wheel is trimmed to required for the microchannels
Shape；
S2, the design requirement according to microchannels process the grinding wheel one by one on the surface of mold core a plurality of parallel miniature
Groove, until the quantity of the microchannels reaches design requirement；
S3, the mold core in step S2 with microchannels is put into molding machine, the raw material of investment production drag reduction film, and led to
It crosses micro injection molding or hot-forming mode is produced with microchannels and meets the micro-structure drag reduction film of design requirement；
S4, the side for deviating from microchannels on the drag reduction film in step S3 is coated into glue-line, is tightly attached to drag reduction film by glue-line
Unmanned plane rotor surface.
7. a kind of manufacturing method of unmanned plane rotor surface micro-structure drag reduction film according to claim 6, it is characterised in that:
Before carrying out step S1, according to the design requirement of drag reduction film, the shape of the mold core is fabricated to the drag reduction with design requirement
Film shape is adapted.
8. a kind of manufacturing method of unmanned plane rotor surface micro-structure drag reduction film according to claim 7, it is characterised in that:
In the step S1, the grinding wheel is super-abrasive grinding wheel, and the dressing method uses dry contact electric discharge, the grinding wheel
Revolving speed N be 2000~5000 revs/min, the normal direction feeding depth h of the grinding wheel is 0.001mm~0.005mm, the grinding wheel
Feed speed V is 100~1000mm/ points.
9. a kind of manufacturing method of unmanned plane rotor surface micro-structure drag reduction film according to claim 8, it is characterised in that:
In the step S2, the microchannels are V-shaped or rectangle or U-shaped, the width S of the microchannels be 0.02mm~
0.4mm, the height H of the microchannels are 0.05mm~0.3mm.
10. a kind of manufacturing method of unmanned plane rotor surface micro-structure drag reduction film according to claim 9, feature exist
In: the microchannels are V-shaped, and the corner angle β of the microchannels is 50 °~60 °.
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| CN201910068662.5A CN109795673B (en) | 2019-01-24 | 2019-01-24 | Manufacturing method of unmanned aerial vehicle rotor wing surface microstructure drag reduction film |
| PCT/CN2019/123600 WO2020151379A1 (en) | 2019-01-24 | 2019-12-06 | Unmanned aerial vehicle rotor surface microstructure drag-reducing film and manufacturing method thereof |
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| WO2020151379A1 (en) * | 2019-01-24 | 2020-07-30 | 深圳大学 | Unmanned aerial vehicle rotor surface microstructure drag-reducing film and manufacturing method thereof |
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| CN109795673B (en) | 2024-03-26 |
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