CN109723671A - A kind of composite material fan blade metal reinforces the manufacturing method on side - Google Patents
A kind of composite material fan blade metal reinforces the manufacturing method on side Download PDFInfo
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- CN109723671A CN109723671A CN201711026455.0A CN201711026455A CN109723671A CN 109723671 A CN109723671 A CN 109723671A CN 201711026455 A CN201711026455 A CN 201711026455A CN 109723671 A CN109723671 A CN 109723671A
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- China
- Prior art keywords
- side wall
- wall plate
- siding
- reinforces
- manufacturing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/02—Selection of particular materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
Abstract
The object of the present invention is to provide the manufacturing methods that a kind of composite material fan blade metal reinforces side, and metal reinforcement side is divided into three parts to manufacture, is the first side wall plate, second side siding and nose cone respectively.In the fabrication process, the medial surface of the first side wall plate and the medial surface of second side siding are separately formed, therefore, after the first side wall plate and second side siding are stitched together, it has also been formed by the inner surface that the medial surface of molding the first side wall plate and the medial surface of second side siding are spliced to form metal reinforcement side, so as to avoid the procedure of processing of the additional inner surface for reinforcing metal side, the difficulty of processing that metal reinforces the inner surface on side is significantly reduced.The lateral surface of the first side wall plate and the lateral surface of second side siding are spliced to form the machined surface that metal reinforces the nose cone on side, and machined surface is for constructing nose cone.
Description
Technical field
The present invention relates to aero-engine fields, and in particular to a kind of composite material fan blade metal reinforces the manufacture on side
Method.
Background technique
With the continuous improvement of composite material technology of preparing, the material property of composite material is also constantly enhancing, composite wood
Expect that the application range in aero-engine field is also more and more extensive.A large amount of uses of composite material, can satisfy boat of new generation
The requirement of empty engine " low noise, low pollution, low cost " improves the market competitiveness.The intensity of composite material is high, but anti-impact
It is undesirable to hit performance.In order to withstand the shock of bird or hard object, composite material fan blade has been all made of metal and has reinforced side
Design, metal reinforce while include leading edge reinforce while, blade tip reinforce while and trailing edge reinforce while.
It is influenced by composite material fan blade special construction, the design and difficulty of processing on metal reinforcement side are very high, mainly
Include:
1) it is larger to reinforce side structure size, and curved to plunder degree larger；
2) leading edge reinforces Bian Yufu material body fits, and section is " V " type, is open narrow, opening depth is big, while side wall plate thickness
Degree is very thin, causes overall stiffness lower, is unfavorable for being machined；
3) requirement on machining accuracy for reinforcing side is higher.
For side these problems existing for process are reinforced, traditional machine add mode is deposited during side is reinforced in processing
The problems such as machining accuracy is low, the period is long and reinforcement side is integrally easily-deformable；Using the direct smelting technology/3D printing technique system of laser
Standby leading edge metal reinforces side, since surface accuracy is inadequate, the works such as also needs to add using electric spark, machine after completing blank molding
Skill finishes surfaces externally and internally, is equally faced with the problem and molding problem on deformation for reinforcing side embedded SMA actuators.
This field needs a kind of composite material fan blade metal that can reduce metal and reinforce side inner surface difficulty of processing
Reinforce the manufacturing method on side.
Summary of the invention
It is described compound the purpose of the present invention is to provide the manufacturing method that a kind of composite material fan blade metal reinforces side
Material fan blade metal reinforce while manufacturing method can reduce metal reinforce while inner surface difficulty of processing.
To realize that the composite material fan blade metal of the purpose reinforces the manufacturing method on side, for manufacturing aeroplane engine
The metal of the fan blade of machine reinforces side, which is characterized in that the composite material fan blade metal reinforces the manufacturing method on side
Include:
A. the first side wall plate and second side siding are manufactured respectively；
B. the first side wall plate and second side siding are stitched together, so that the inside of the first side wall plate
The medial surface of face and second side siding is spliced to form the metal and reinforces the inner surface on side, and makes the first side wall plate
The lateral surface of lateral surface and second side siding is spliced to form the machined surface that the metal reinforces the nose cone on side；
C. the nose cone is constructed on the machined surface.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is, described in manufacture
The step of the first side wall plate and second side siding includes:
Metal plate is processed using hot-forming technique, to obtain the first side wall plate and second side siding
Blank.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is, described in manufacture
The step of the first side wall plate and second side siding further include:
The edge contour of the blank is cut, to form the first side wall plate and second side siding,
And guarantee is at the flatness of the splicing seams of the stitching portion of the first side wall plate and second side siding.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is, in the heat
In molded technique, the first side wall plate and second side siding are manufactured using side wall board forming die；
The side wall board forming die has the inside of the medial surface and second side siding that make the first side wall plate
The molding shape in face.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is, using mostly certainly
The blank is cut by degree laser cutting parameter, and be used in the laser of cutting perpendicular to the first side wall plate and
The type face of second side siding, with guarantee the stitching portion of the first side wall plate and second side siding splicing seams it is flat
Whole degree.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is, by described the
The step of side siding and second side siding are stitched together include:
Splicing seams along the stitching portion of the first side wall plate and second side siding are welded, by described first
Sidewall paneling and second side siding are stitched together.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is the welding
For laser welding；Laser power is debugged before welding, the case where to avoid solder skip or burn-through occur.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is added described
The step of constructing the nose cone on work face include:
The building nose cone is laminated on the machined surface using increasing material manufacturing technique.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is, to described
The nose cone formed in the technique of increasing material manufacturing is post-processed, until the size of the nose cone meets design size requirement.
The composite material fan blade metal reinforces the manufacturing method on side, and further feature is located after described
Science and engineering skill includes one or more of machining, electrical discharge machining, polishing and chemical attack.
The positive effect of the present invention is that: composite material fan blade metal provided by the invention reinforces the manufacture on side
Metal reinforcement side is divided into three parts to manufacture, is the first side wall plate, second side siding and nose cone respectively by method.It was manufacturing
Cheng Zhong, the medial surface of the first side wall plate and the medial surface of second side siding have had the shape of the inner surface on metal reinforcement side,
Therefore, after the first side wall plate and second side siding are stitched together, by the medial surface of molding the first side wall plate and
The shape that the medial surface of two sidewall panelings is spliced to form the inner surface that metal reinforces side also has been worked upon out, so as to avoid volume
The procedure of processing of the outer inner surface for reinforcing metal side significantly reduces the difficulty of processing that metal reinforces the inner surface on side.The
The lateral surface of side siding and the lateral surface of second side siding are spliced to form the machined surface that metal reinforces the nose cone on side, and machined surface is used
In building nose cone.
Detailed description of the invention
The above and other features of the present invention, property and advantage will pass through retouching with reference to the accompanying drawings and examples
It states and becomes readily apparent from, in which:
Fig. 1 is the schematic diagram of the fan blade of aero-engine；
Fig. 2 is the sectional view of the fan blade of aero-engine, it is shown that the positional relationship on metal reinforcement side and blade；
Fig. 3 is the schematic diagram that metal reinforces side；
Fig. 4 is the schematic diagram of side wall board forming die；
Fig. 5 is the schematic diagram that the first side wall plate and second side siding are stitched together.
Specific embodiment
The invention will be further described with attached drawing combined with specific embodiments below, elaborates in the following description more
Details to facilitate a thorough understanding of the present invention, still the present invention obviously can be come with a variety of other ways different from this description it is real
It applies, those skilled in the art can make similar popularization according to practical situations without violating the connotation of the present invention, drill
It unravels silk, therefore should not be limited the scope of the invention with the content of this specific embodiment.
It should be noted that Fig. 1 to Fig. 5 only as an example, its not be according to equal proportion condition draw, and
It should not be construed as limiting in this, as the protection scope to actual requirement of the present invention."front", "rear" is identified attached in the present invention
In Fig. 1, during the work time, air-flow is from blade " preceding " effluent to " rear " side.
As shown in Figure 1, the fan blade of aero-engine includes the blade body 10, Yi Jifen using composite material production
The metal of the leading edge and rear that are not coated on blade body 10 reinforces side 20, and metal, which reinforces side 20, can be up-front metal reinforcement
Side 20, the metal for being also possible to rear reinforce side 20.By taking up-front metal reinforces side as an example, as shown in Figure 2,3, metal reinforces side
20 include the first side wall plate 201, second side siding 202 and nose cone 203.The section that metal reinforces side 20 is " V " type, is open narrow,
The depth that is open is big, while the very thin thickness of the first side wall plate 201 and second side siding 202, causes overall stiffness lower, is unfavorable for
Machining.
In a comparative example, metal reinforces side 20 by the direct smelting technology of laser and 3D printing technique come a system
It makes, but since surface accuracy is inadequate, the techniques such as also needs to add using electric spark, machine add after completing blank molding to metal
The surfaces externally and internally on strong side 20 is finished, and difficulty is larger.
The present invention reinforces the system on side 20 by the metal that following embodiment provides a kind of new composite material fan blade
Method is made, this method can reduce the difficulty of processing that metal reinforces side inner surface.
Composite material fan blade metal reinforce side manufacturing method include:
A. the first side wall plate 201 and second side siding 202 are manufactured, and makes the medial surface 201a and the of the first side wall plate 201
The medial surface 202a of two sidewall panelings 202 is separately formed；
B. the first side wall plate 201 and second side siding 202 are stitched together, so that the medial surface of the first side wall plate 201
The medial surface 202a of 201a and second side siding 202 is spliced to form metal and reinforces the inner surface 20a on side 20, and makes the first side wall plate
The 201 lateral surface 201b and lateral surface 202b of second side siding 202 is spliced to form the processing that metal reinforces the nose cone 203 on side 20
Face 20b；
C. nose cone 203 is constructed on machined surface 20b.
Above-mentioned steps a can be realized by hot-forming technique, and metal plate 6 is processed using hot-forming technique,
To obtain the blank of the first side wall plate 201 and second side siding 202；In hot-forming technique, the first side wall plate 201
The medial surface 202a of medial surface 201a and second side siding 202 is separately formed.
As shown in figure 4, manufacturing 201 He of the first side wall plate using side wall board forming die 4 in hot-forming technique
Second side siding 202；Side wall board forming die 4 has the medial surface 201a's and second side siding 202 for making the first side wall plate 201
The molding shape of medial surface 202a.
In one embodiment, side wall board forming die 4 includes upper mold 41 and lower die 42, and metal plate 6 is placed on upper mold 41
Between lower die 42, upper mold 41 and lower die 42 are molded by shop bolt 5, upper mold 41 and lower die 42 mold after type chamber according to the
The shape of side siding 201 and second side siding 202 designs.After upper mold 41 and the molding of lower die 42 by the way of heating, make
Metal plate 6 is plastically deformed, to obtain the blank of the first side wall plate 201 and second side siding 202.By hot-forming
Afterwards, the medial surface 201a of the first side wall plate 201 and the medial surface 202a of second side siding 202 are directly pressed molding, are not necessarily to volume
Outer processing.
It should be noted that the medial surface 201a of the first side wall plate 201 and the medial surface 202a of second side siding 202 can also
To be processed using other modes, such as machining.Divide since the first side wall plate 201 and second side siding 202 are in processing
From state, so all having the advantages that easy to process regardless of being processed using which kind of mode.
After obtaining blank, next need to cut the edge contour of blank according to design shape, with shape
At the first side wall plate 201 and second side siding 202.In one embodiment, the mode of cutting is to be cut using multiple degrees of freedom laser
It cuts technique to cut blank, and is used in the laser of cutting perpendicular to the first side wall plate 201 and second side siding 202
Type face, to guarantee the flatness of the splicing seams 3 of the stitching portion of the first side wall plate 201 and second side siding 202.
After the first side wall plate 201 and the spelling of second side siding 202 are put together, the edge of two boards just will form splicing seams
3.When cutting to blank, it need to guarantee the first side wall plate 201 and 202 edge part of second side siding according to being pre-designed
The precision divided, this ensures that the flatness of splicing seams 3.
With continued reference to Fig. 5, as above-mentioned steps b is described, formed in the first side wall plate 201 and second side siding 202
Bi Hou needs to put together the first side wall plate 201 and the spelling of second side siding 202, further along the first side wall plate 201 and second side
The splicing seams 3 of the stitching portion of siding 202 are welded, and the first side wall plate 201 and second side siding 202 are stitched together.
Welding can be laser welding, as shown in figure 5, before welding, needing the first side wall plate 201 and second sidewall
Plate 202 is placed on core model 7 and is fixed, the spelling using 3D printing laser 8 to the first side wall plate 201 and second side siding 202
Seam 3 is welded, and debugs laser power before welding, the case where to avoid solder skip or burn-through occur.
After the first side wall plate 201 and second side siding 202 are stitched together, the medial surface 201a of the first side wall plate 201 and
The medial surface 202a of second side siding 202 is spliced to form metal and reinforces the inner surface 20a on side 20, and makes the first side wall plate 201
The lateral surface 202b of lateral surface 201b and second side siding 202 is spliced to form the machined surface that metal reinforces the nose cone 203 on side 20
20b。
After the first side wall plate 201 and second side siding 202 are stitched together, the medial surface 201a of the first side wall plate 201
It has been formed with the medial surface 202a of second side siding 202, therefore, has been spliced to form the inner surface 20a that metal reinforces side 20
It has been formed that, so as to avoid the procedure of processing of the additional inner surface 20a for reinforcing metal side 20, significantly reduce metal and add
The difficulty of processing of the inner surface on strong side.
The lateral surface 201b of the first side wall plate 201 and lateral surface 202b of second side siding 202 is spliced to form metal reinforcement
The machined surface 20b of the nose cone 203 on side 20, machined surface 20b are for constructing nose cone 203.
The step of building nose cone 203 mentioned in above-mentioned steps c include: using increasing material manufacturing technique on machined surface 20b
Stacking building nose cone 203.After the completion of the welding of the first side wall plate 201 and second side siding 202, used on machined surface 20b
The molding of the progress nose cone 203 of 3D printing laser 8.In forming process, need to carry out testpieces the heat treatment of appropriate number,
To eliminate thermal stress influence, the deformation of Control experiment part.Using the molding nose cone 203 of increasing material manufacturing, than the size of design requirement
Certain surplus is reserved, following process is facilitated.
After the process of increasing material manufacturing, it is also necessary to after being carried out to the nose cone 203 formed in the technique of increasing material manufacturing
Reason, until the size of nose cone 203 meets design size requirement.Post-processing includes that machining, electrical discharge machining, polishing and chemistry are rotten
One or more of erosion.
Although the present invention is disclosed as above with preferred embodiment, it is not for limiting the present invention, any this field skill
Art personnel without departing from the spirit and scope of the present invention, can make possible variation and modification, all without departing from this hair
The content of bright technical solution, according to the technical essence of the invention any modification to the above embodiments, equivalent variations and repair
Decorations, each fall within the protection scope that the claims in the present invention are defined.
Claims (10)
1. a kind of composite material fan blade metal reinforces the manufacturing method on side, for manufacturing the fan blade of aero-engine
(10) metal reinforces side (20), which is characterized in that the manufacturing method that the composite material fan blade metal reinforces side includes:
A. the first side wall plate (201) and second side siding (202) are manufactured respectively；
B. the first side wall plate (201) and second side siding (202) are stitched together, so that the first side wall plate
(201) medial surface (202a) of medial surface (201a) and second side siding (202) is spliced to form the metal and reinforces side
(20) inner surface (20a), and make the lateral surface (201b) and second side siding (202) of the first side wall plate (201)
Lateral surface (202b) be spliced to form the machined surface (20b) that the metal reinforces the nose cone (203) of side (20)；
C. it is constructed on the machined surface (20b) nose cone (203).
2. the manufacturing method that composite material fan blade metal as described in claim 1 reinforces side, which is characterized in that manufacture institute
The step of stating the first side wall plate (201) and second side siding (202) include:
Metal plate (6) are processed, using hot-forming technique to obtain the first side wall plate (201) and the second sidewall
The blank of plate (202).
3. the manufacturing method that composite material fan blade metal as claimed in claim 2 reinforces side, which is characterized in that manufacture institute
The step of stating the first side wall plate (201) and second side siding (202) further include:
The edge contour of the blank is cut, to form the first side wall plate (201) and second side siding
(202), and guarantee into the flat of the splicing seams (3) of the first side wall plate (201) and the stitching portion of second side siding (202)
Whole degree.
4. the manufacturing method that composite material fan blade metal as claimed in claim 2 reinforces side, which is characterized in that described
In hot-forming technique, the first side wall plate (201) and the second sidewall are manufactured using side wall board forming die (4)
Plate (202)；
The side wall board forming die (4) has the medial surface (201a) for making the first side wall plate (201) and described second side
Medial surface (202a) molding shape of siding (202).
5. the manufacturing method that composite material fan blade metal as claimed in claim 3 reinforces side, which is characterized in that using more
Freedom degree laser cutting parameter cuts the blank, and is used in the laser of cutting perpendicular to the first side wall plate
(201) and the type face of second side siding (202), to guarantee the first side wall plate (201) and second side siding
(202) flatness of the splicing seams (3) of stitching portion.
6. the manufacturing method that composite material fan blade metal as described in claim 1 reinforces side, which is characterized in that will be described
The step of the first side wall plate (201) and second side siding (202) are stitched together include:
Splicing seams (3) along the first side wall plate (201) and the stitching portion of second side siding (202) are welded, with
The first side wall plate (201) and second side siding (202) are stitched together.
7. the manufacturing method that composite material fan blade metal as claimed in claim 6 reinforces side, which is characterized in that the weldering
It is connected in laser welding；Laser power is debugged before welding, the case where to avoid solder skip or burn-through occur.
8. the manufacturing method that composite material fan blade metal as described in claim 1 reinforces side, which is characterized in that described
The step of nose cone (203) are constructed on machined surface (20b) include:
The building nose cone (203) is laminated on the machined surface (20b) using increasing material manufacturing technique.
9. the manufacturing method that composite material fan blade metal as claimed in claim 8 reinforces side, which is characterized in that in institute
It states the nose cone (203) formed in the technique of increasing material manufacturing to be post-processed, until the size satisfaction of the nose cone (203) is set
Count size requirement.
10. the manufacturing method that composite material fan blade metal as claimed in claim 9 reinforces side, which is characterized in that described
Post-processing includes one or more of machining, electrical discharge machining, polishing and chemical attack.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711026455.0A CN109723671A (en) | 2017-10-27 | 2017-10-27 | A kind of composite material fan blade metal reinforces the manufacturing method on side |
| PCT/CN2018/094761 WO2019080539A1 (en) | 2017-10-27 | 2018-07-06 | Method of manufacturing metal reinforced rim of composite material fan blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711026455.0A CN109723671A (en) | 2017-10-27 | 2017-10-27 | A kind of composite material fan blade metal reinforces the manufacturing method on side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109723671A true CN109723671A (en) | 2019-05-07 |
Family
ID=66246167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711026455.0A Pending CN109723671A (en) | 2017-10-27 | 2017-10-27 | A kind of composite material fan blade metal reinforces the manufacturing method on side |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109723671A (en) |
| WO (1) | WO2019080539A1 (en) |
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| CN110239126A (en) * | 2019-06-10 | 2019-09-17 | 中国科学院工程热物理研究所 | Manufacturing method for aeroengine fan blades |
| CN111774876A (en) * | 2020-07-13 | 2020-10-16 | 安徽奔腾五金制造有限公司 | Electric fan blade machining device and working method thereof |
| CN113263250A (en) * | 2021-04-20 | 2021-08-17 | 上海交通大学 | Composite manufacturing method of metal reinforcing edge of aircraft engine fan blade |
| CN113459526A (en) * | 2021-06-30 | 2021-10-01 | 中国航空制造技术研究院 | Glue joint forming method for composite material fan blade and metal wrapping edge |
| CN114000923A (en) * | 2021-09-28 | 2022-02-01 | 中国船舶工业集团公司第七0八研究所 | Composite material turbo machinery impeller |
| CN114439614A (en) * | 2020-10-30 | 2022-05-06 | 中国航发商用航空发动机有限责任公司 | Aircraft engine's fan blade and aircraft engine |
| CN114535598A (en) * | 2020-11-18 | 2022-05-27 | 中国航发商用航空发动机有限责任公司 | Manufacturing method and manufacturing system of metal reinforcing edge of blade and fan blade |
| CN114535935A (en) * | 2022-02-23 | 2022-05-27 | 上海涵鲲科技有限公司 | Metal edge sealing of fan blade and processing method thereof |
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| CN111774876A (en) * | 2020-07-13 | 2020-10-16 | 安徽奔腾五金制造有限公司 | Electric fan blade machining device and working method thereof |
| CN111774876B (en) * | 2020-07-13 | 2021-06-22 | 安徽奔腾五金制造有限公司 | Electric fan blade machining device and working method thereof |
| CN114439614A (en) * | 2020-10-30 | 2022-05-06 | 中国航发商用航空发动机有限责任公司 | Aircraft engine's fan blade and aircraft engine |
| CN114535598A (en) * | 2020-11-18 | 2022-05-27 | 中国航发商用航空发动机有限责任公司 | Manufacturing method and manufacturing system of metal reinforcing edge of blade and fan blade |
| CN113263250A (en) * | 2021-04-20 | 2021-08-17 | 上海交通大学 | Composite manufacturing method of metal reinforcing edge of aircraft engine fan blade |
| CN113459526A (en) * | 2021-06-30 | 2021-10-01 | 中国航空制造技术研究院 | Glue joint forming method for composite material fan blade and metal wrapping edge |
| CN113459526B (en) * | 2021-06-30 | 2022-06-10 | 中国航空制造技术研究院 | Glue joint forming method for composite material fan blade and metal wrapping edge |
| CN114000923A (en) * | 2021-09-28 | 2022-02-01 | 中国船舶工业集团公司第七0八研究所 | Composite material turbo machinery impeller |
| CN114535935A (en) * | 2022-02-23 | 2022-05-27 | 上海涵鲲科技有限公司 | Metal edge sealing of fan blade and processing method thereof |
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| WO2019080539A1 (en) | 2019-05-02 |
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