CN114378986A - Telescopic paddle die assembly - Google Patents
Telescopic paddle die assembly Download PDFInfo
- Publication number
- CN114378986A CN114378986A CN202111513516.2A CN202111513516A CN114378986A CN 114378986 A CN114378986 A CN 114378986A CN 202111513516 A CN202111513516 A CN 202111513516A CN 114378986 A CN114378986 A CN 114378986A
- Authority
- CN
- China
- Prior art keywords
- die
- fixing plate
- blade
- upper die
- lower die
- Prior art date
- 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.)
- Pending
Links
- 238000010030 laminating Methods 0.000 claims abstract description 3
- 238000007493 shaping process Methods 0.000 claims abstract description 3
- 238000003825 pressing Methods 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims 11
- 238000000034 method Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 9
- 238000001816 cooling Methods 0.000 abstract description 8
- 238000003754 machining Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/30—Mounting, exchanging or centering
- B29C33/301—Modular mould systems [MMS], i.e. moulds built up by stacking mould elements, e.g. plates, blocks, rods
- B29C33/302—Assembling a large number of mould elements to constitute one cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention belongs to the field of helicopter rotor part machining, and particularly relates to a telescopic blade die assembly which comprises a lower die fixing plate, a lower die, an upper die and an upper die fixing plate; the lower die is arranged on the lower die fixing plate, and the upper die is arranged on the lower side of the upper die fixing plate; the middle cavity that defines the paddle appearance that forms after lower mould and last mould laminating for the shaping paddle, the upper and lower mould tip that its paddle point portion corresponds respectively with lower mould fixed plate, upper die fixed plate sliding fit. By adopting the die assembly provided by the invention, the cooling shrinkage in the forming process can be matched by utilizing the relative movable fit relation between the upper die and the lower die, so that the problem of stress generation caused by inconsistent thermal expansion coefficients of the two materials is well solved.
Description
Technical Field
The invention belongs to the field of machining of helicopter rotor parts, and particularly relates to a telescopic blade die assembly.
Background
The two different materials have different expansion coefficients, the same two materials have different sizes after being heated to a certain temperature, the phenomenon also exists in the process of forming the blade of the helicopter, the process of forming the blade is approximately as follows, when the temperature is normal, carbon cloth is paved on a mould and other related parts are assembled, then the mould is closed, the mould is heated to a certain temperature and is kept warm for a certain time, the material in the mould cavity begins to solidify, at the moment, the blade is formed in place, when the blade is long and the shape of the blade tip part of the blade is complex, because the thermal expansion coefficients of the parts and the mould are inconsistent, in the process of cooling, the thermal expansion coefficient of the mould is large, the thermal expansion coefficient of the blade is small, therefore, the mould shrinks fast, the blade shrinks slowly, and because the mould and the blade shrink are inconsistent, the formed blade can generate stress, affecting blade life.
Disclosure of Invention
Object of the Invention
The problem that stress is generated on the paddle due to the fact that thermal expansion coefficients of the paddle and a die are not consistent in the forming process is solved.
The technical scheme is as follows:
a telescopic blade die assembly comprises a lower die fixing plate, a lower die, an upper die and an upper die fixing plate; the lower die is arranged on the lower die fixing plate, and the upper die is arranged on the lower side of the upper die fixing plate; the middle cavity that defines the paddle appearance that forms after lower mould and last mould laminating for the shaping paddle, the upper and lower mould tip that its paddle point portion corresponds respectively with lower mould fixed plate, upper die fixed plate sliding fit.
Preferably, the lower die adopts a split combination form and consists of lower die fixed blocks corresponding to blade body forming and lower die movable blocks corresponding to blade tip forming; the lower die movable blocks are connected with the lower die fixing plate in a sliding mode.
Preferably, the upper die corresponding to the lower die also adopts a split combination form and consists of an upper die fixed block corresponding to blade body forming and an upper die movable block corresponding to blade tip forming; the upper die movable block is connected with the upper die fixing plate in a sliding mode.
Preferably, one end of the lower die fixing plate is provided with a guide rail, and the lower die movable blocks are arranged on the guide rail and can slide back and forth along the guide rail.
Preferably, a guide rail is arranged at one end of the upper die fixing plate, and the upper die movable blocks are arranged on the guide rail and can slide back and forth along the guide rail.
Preferably, a paddle root blocking cover is arranged at one end part of the lower die fixing block; and is pressed by a pressing device arranged on the lower die fixing plate; the pressing device adopts a form that the bracket is matched with the screw rod.
Preferably, the end part of the other end of the upper die fixing block is also provided with a pressing device.
The beneficial technical effects are as follows:
the thermal expansion coefficients of the blade and the mould are not consistent, so that the thermal expansion coefficient of the mould is large and the thermal expansion coefficient of the blade is small in the cooling process, the mould is high in shrinkage speed and low in shrinkage speed, the blade is cured and formed after the blade and the mould reach a certain temperature and are kept warm for a certain time, and the cooling shrinkage amount in the forming process can be matched by using the relative movable matching relationship between the upper mould and the lower mould due to the high thermal expansion coefficient of the mould in the cooling process, so that the problem of stress caused by the inconsistent thermal expansion coefficients of the two materials is well solved.
Drawings
Figure 1 is a schematic view of the assembly of the present invention,
fig. 2 is an assembly view of the lower mold and the lower mold fixing plate.
The device comprises a lower die fixing plate 1, a guide rail 2, a pressing block 3, a lower die movable block 4, a lower die fixed block 5, an upper die movable block 6, an upper die fixing plate 7, an upper die fixed block 8, a paddle root blanking cover 9 and a pressing device 10.
Detailed Description
The present invention will be described in detail below with reference to the drawings of the specification, and in the description of the present invention, it should be noted that, for example, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used, and the indicated orientations or positional relationships thereof are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1 and 2, the retractable blade die assembly comprises a lower die fixing plate 1, a guide rail 2, a pressing block 3, a lower die movable block 4, a lower die fixed block 5, an upper die movable block 6, an upper die fixed block 8 and an upper die fixing plate 7; wherein, the lower die movable block 4 and the lower die fixed block 5 jointly form a lower die, and the upper die movable block 6 and the upper die fixed block 8 are combined to form an upper die; the lower die is arranged on the lower die fixing plate 1, and the upper die is arranged on the lower side of the upper die fixing plate 7; the middle of the lower die is formed with a cavity for defining the appearance of the blade after the lower die and the upper die are attached, the cavity is used for forming the blade, and the end parts of the upper die and the lower die corresponding to the tip part of the blade are respectively in sliding fit with the lower die fixing plate 1 and the upper die fixing plate 7; the designed upper die movable block 6 and the lower die movable block 4 can well realize a sliding fit form; in principle, other further embodiments are also possible. During design, in order to better ensure the shape of a paddle root, a paddle root blocking cover 9 is arranged at the end part of the lower die fixing block 5 corresponding to the paddle root, and the upper end surface of the paddle root blocking cover 9 protrudes out of a part of the lower die fixing block 5; the corresponding upper die fixing block 8 is provided with a notch at the end part, and the paddle root blocking cover 9 just blocks the end part of the cavity after the upper die and the lower die are closed; the paddle root blocking cover 9 can be pressed and fixed through a pressing device 10; and the paddle root blocking cover 9 is prevented from moving to cause adverse influence on the appearance of the paddle in the forming process.
When in specific design, one end of a lower die fixing plate 1 is provided with a lower die fixing block 5, the other end of the lower die fixing plate 1 is provided with a groove, a guide rail 2 is embedded in the groove, a lower die movable block 4 is also provided with a groove which is matched with the guide rail 2 and can freely move on the lower die fixing plate 1 along the length direction, a press block 3 is used for limiting the movement of the lower die movable block 4 when the lower die movable block is put down up and down, an upper die fixing block 8 is also arranged on an upper die fixing plate 7, the other end of the lower die movable block is provided with an upper die movable block 6, the upper die and the lower die are matched and heated to form parts, the two different materials have different expansion coefficients, the same two materials can also become different in size after being heated to a certain temperature, the phenomenon also exists in the blade forming process of the helicopter, the blade forming process is approximately as follows, and carbon cloth and other related parts are paved on the die at normal temperature, then closing the die, when the die is heated to a certain temperature and is kept warm for a certain period of time, the material in the die cavity begins to solidify, at the moment, the blade is molded in place, when the blade is long and the shape of the blade tip part is complex, because the thermal expansion coefficients of the blade and the die are not consistent, the thermal expansion coefficient of the die is large and the thermal expansion coefficient of the blade is small in the cooling process, the die shrinks quickly and the blade shrinks slowly, because the shrinkage rates of the die and the blade are not consistent, when the die and the blade reach a certain temperature and are kept warm for a certain time, the blade is solidified and molded, and because the thermal expansion coefficient of the die is large in the cooling process, the die shrinks quickly, the movable blocks and the fixed blocks of the upper die and the lower die can be separated, the molded blade cannot be limited, the die pressing device which can be implemented as above is adopted, and the relative movable fit relationship between the upper die and the lower die is utilized, the cooling shrinkage in the forming process can be matched, so that the problem of stress caused by inconsistent thermal expansion coefficients of the two materials is well solved.
It should be noted that, although not described in detail in the above embodiments, the embodiments are regarded as the prior art, and may be combined and superimposed to match each other by a simple combination in order to achieve the most basic functions and requirements of the invention. The embodiments do not limit the scope of the present invention, and in principle, other variations and combinations based on the design concept of the present invention fall within the scope of the present invention.
Claims (8)
1. A telescopic blade die assembly is characterized by comprising a lower die fixing plate, a lower die, an upper die and an upper die fixing plate; the lower die is arranged on the lower die fixing plate, and the upper die is arranged on the lower side of the upper die fixing plate; the middle cavity that defines the paddle appearance that forms after lower mould and last mould laminating for the shaping paddle, the upper and lower mould tip that its paddle point portion corresponds respectively with lower mould fixed plate, upper die fixed plate sliding fit.
2. The retractable blade molding press as claimed in claim 1, wherein the lower mold is in a split combination form and is composed of a lower mold fixed block corresponding to blade body molding and a lower mold movable block corresponding to blade tip molding; the lower die movable blocks are connected with the lower die fixing plate in a sliding mode.
3. The retractable blade molding apparatus as claimed in claim 2, wherein said lower mold fixing plate is provided at one end thereof with a guide rail, and said lower mold movable segment is disposed on the guide rail to be slidable back and forth along the guide rail.
4. The retractable blade molding press as claimed in claim 2, wherein a blade root cap is provided at one end of the lower mold fixing block; and is pressed by a pressing device arranged on the lower die fixing plate.
5. The retractable blade molding press as claimed in claim 4, wherein said pressing means is in the form of a bracket fitted with a screw.
6. The retractable blade molding press as claimed in claim 4, wherein said upper end surface of said blade root block is projected from a portion of the upper end surface of the lower mold fixing segment; the corresponding upper die fixing block end is provided with a gap, and after the upper die and the lower die are closed, the paddle root blocking cover just blocks the end of the cavity.
7. The retractable blade molding press device as claimed in claim 1 or 2, wherein the upper mold corresponding to the lower mold is also in a split combination form and is composed of an upper mold fixed block corresponding to blade body molding and an upper mold movable block corresponding to blade tip molding; the upper die movable block is connected with the upper die fixing plate in a sliding mode.
8. The retractable blade molding apparatus as claimed in claim 7, wherein said upper mold plate has a guide rail at one end thereof, and said upper mold movable segment is disposed on the guide rail to be slidable back and forth along the guide rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111513516.2A CN114378986A (en) | 2021-12-10 | 2021-12-10 | Telescopic paddle die assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111513516.2A CN114378986A (en) | 2021-12-10 | 2021-12-10 | Telescopic paddle die assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114378986A true CN114378986A (en) | 2022-04-22 |
Family
ID=81196633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111513516.2A Pending CN114378986A (en) | 2021-12-10 | 2021-12-10 | Telescopic paddle die assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114378986A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972447A (en) * | 2022-12-31 | 2023-04-18 | 安徽劲旋风航空科技有限公司 | Composite material paddle mould |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170368740A1 (en) * | 2016-06-22 | 2017-12-28 | Carbon, Inc. | Dual cure resins containing microwave absorbing materials and methods of using the same |
| CN209599788U (en) * | 2019-03-06 | 2019-11-08 | 重庆鸿晟达新材料科技有限公司 | A kind of mold heating device of badminton racquet |
| CN112208119A (en) * | 2020-08-14 | 2021-01-12 | 中国人民解放军总参谋部第六十研究所 | Thermal deformation self-adaptive forming die for helicopter blade and using method |
| CN112406135A (en) * | 2020-11-06 | 2021-02-26 | 航天海鹰(镇江)特种材料有限公司 | Method for assisting forming of composite propeller blade by air bag blowing |
-
2021
- 2021-12-10 CN CN202111513516.2A patent/CN114378986A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170368740A1 (en) * | 2016-06-22 | 2017-12-28 | Carbon, Inc. | Dual cure resins containing microwave absorbing materials and methods of using the same |
| CN209599788U (en) * | 2019-03-06 | 2019-11-08 | 重庆鸿晟达新材料科技有限公司 | A kind of mold heating device of badminton racquet |
| CN112208119A (en) * | 2020-08-14 | 2021-01-12 | 中国人民解放军总参谋部第六十研究所 | Thermal deformation self-adaptive forming die for helicopter blade and using method |
| CN112406135A (en) * | 2020-11-06 | 2021-02-26 | 航天海鹰(镇江)特种材料有限公司 | Method for assisting forming of composite propeller blade by air bag blowing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972447A (en) * | 2022-12-31 | 2023-04-18 | 安徽劲旋风航空科技有限公司 | Composite material paddle mould |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |