CN114474774A - Appearance control method for large-curvature hybrid structure part - Google Patents
Appearance control method for large-curvature hybrid structure part Download PDFInfo
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- CN114474774A CN114474774A CN202011260001.1A CN202011260001A CN114474774A CN 114474774 A CN114474774 A CN 114474774A CN 202011260001 A CN202011260001 A CN 202011260001A CN 114474774 A CN114474774 A CN 114474774A
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- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
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- 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
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- 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
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
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- 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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
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- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
-
- 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
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3097—Cosmonautical vehicles; Rockets
Abstract
The invention provides a method for controlling the appearance of a large-curvature hybrid structure part, which comprises the following steps: analyzing the appearance of the part; selecting design parameters of a forming tool, carrying out simulation analysis, determining possible out-of-tolerance areas and out-of-tolerance ranges in the shapes of the parts, and determining the design parameters of the forming tool; manufacturing a molding tool, namely manufacturing the molding tool, and setting an adjustable point at a position of a molded surface of the molding tool, which corresponds to a possible out-of-tolerance area of a part; designing and manufacturing an adjustable tool; a part molding step, adjusting the tool profile into a theoretical profile, and molding the part; and a step of controlling the shape of the part, which is to detect and analyze the obtained shape of the part, find out an out-of-tolerance area and an out-of-tolerance range, adjust an adjustable point of the tool profile corresponding to the found out-of-tolerance area, form the part again, detect and analyze the shape of the manufactured part, adjust the forming tool, and iterate repeatedly until the tool profile completely meeting the requirement of the part shape is obtained.
Description
Technical Field
The invention relates to the field of composite material forming, in particular to a method for controlling the appearance of a part with a large-curvature hybrid structure.
Background
In the field of aeronautical manufacturing, leading edge parts generally adopt a U-shaped large-curvature structure. Among them, the shape control is one of the biggest technical difficulties in the manufacturing process of the large-curvature structural component.
In contrast, patent document 1 provides a manufacturing process of a large-curvature full-face thin-walled plate, including the steps of: (1) roughly processing an external cavity profile; (2) roughly machining the molded surface of the inner cavity; (3) naturally failing; (4) punching a plane to eliminate deformation, and expanding and reaming a process hole; (5) semi-finish and finish machining of the inner cavity profile; (6) filling gypsum; (7) semi-finishing and finish-finishing the external cavity profile; (8) and (5) polishing by a bench worker and other process flows.
Documents of the prior art
Patent document
Patent document 1: CN103639655A
In the prior art, related process parameters are mainly controlled by advanced equipment, and a machining process is optimized so as to meet the requirement of precise appearance of parts. The method not only can accurately control the appearance of the large-curvature part, but also can realize the operation process and standardization, thereby improving the production efficiency and the part qualification rate. However, this method is only suitable for metal part forming.
Currently, the configuration of the hybrid structure with large curvature is more and more widely applied from the viewpoints of weight reduction, bird impact resistance and the like. However, the deformation tendency of the parts after being glued is not easy to predict due to the inconsistent thermal expansion coefficients of the metal and the composite material, and the appearance and the internal quality cannot be ensured by only depending on the later mechanical processing. Moreover, for the manufacture of the parts with the hybrid structure of metal and composite materials, because the deformation tendencies of the metal and the composite materials are inconsistent, a consistent mode is difficult to find only by depending on mechanical processing and material characteristics, and the processing process can also cause irreversible damage to the internal quality of the parts. At present, the hybrid structure part is generally formed by adopting a female die forming mode, but the part deformation trend is unclear, and the part appearance requirement can be met only by die repairing and repeated iteration. The method has high cost and long period, and the mould repair has great uncertainty, thereby leading the appearance of the part to exceed the specified appearance requirement.
Therefore, there is a need for a method for controlling the shape of a large-curvature hybrid component, which can achieve precise control of the shape of the large-curvature hybrid component.
Disclosure of Invention
The invention aims to provide a method for controlling the appearance of a large-curvature hybrid structure part, which adjusts the tool profile of a forming tool of the large-curvature hybrid structure part by means of an adjustable tool, so that the accurate control of the appearance of the large-curvature hybrid structure part can be realized.
The present invention achieves the above object by the following means.
The invention provides a method for controlling the appearance of a part with a large-curvature hybrid structure, which is used when the part with the large-curvature hybrid structure is molded by adopting a female die molding mode and comprises the following steps: a part shape analyzing step of analyzing the shape of the part to be manufactured; selecting design parameters of a forming tool, carrying out simulation analysis, determining possible out-of-tolerance areas and out-of-tolerance ranges in the appearance of the part according to simulation analysis results and part characteristics, and determining the design parameters of the forming tool; manufacturing a molding tool, namely manufacturing the molding tool according to the design parameters of the molding tool, and setting an adjustable point at a position of a tool profile of the molding tool, which corresponds to a possible out-of-tolerance area in the shape of the part; designing and manufacturing an adjustable tool, namely designing and manufacturing the adjustable tool according to the appearance characteristics and the easily-deformable area of the part; a part forming step, wherein according to the shape of the part, the tool profile of the forming tool is adjusted to a theoretical profile required by the part to be manufactured by the adjustable tool, and the adjusted forming tool is used for forming the part; and a step of controlling the shape of the part, which is to detect and analyze the shape of the part obtained by the adjusted forming tool with the theoretical profile, find out an out-of-tolerance region and an out-of-tolerance range, adjust an adjustable point of the tool profile corresponding to the found out-of-tolerance region by the adjustable tool, form the part by the adjusted forming tool, detect and analyze the shape of the manufactured part, adjust the tool profile of the forming tool, and iterate repeatedly until the tool profile of the forming tool completely meets the shape requirement of the part is obtained.
In the 2 nd aspect of the present invention, in the method for controlling the outer shape of a large-curvature hybrid component according to the 1 st aspect, in the step of selecting the design parameters of the molding tool, the thickness of the molding tool is selected so as to have the rigidity required for molding the component and to be adjustable.
In the 3 rd aspect of the present invention, in addition to the method for controlling the outer shape of a component having a hybrid structure with a large curvature according to the 1 st or 2 nd aspect, the step of forming the component further includes a 1 st detecting and determining step of detecting the adjusted tool profile of the forming tool by using a laser tracker, and determining whether or not the tool profile of the forming tool is adjusted to a theoretical profile.
In the 4 th aspect of the present invention, on the basis of the method for controlling the outer shape of a large-curvature hybrid component according to the 3 rd aspect, the method further includes a 2 nd detection and judgment step of detecting the adjusted tool profile of the molding tool by using a laser tracker, and judging whether the tool profile of the molding tool is adjusted to a newly required tool profile.
Effects of the invention
According to the method for controlling the appearance of the large-curvature hybrid structure part, the following effects can be obtained.
(1) The controllability is strong: only the out-of-tolerance area is adjusted by means of the adjustable point of the forming tool, so that the influence of manual die repair on the out-of-tolerance edge area is avoided, and the appearance of the whole part is completely controllable;
(2) the universality is strong: the method can be applied to female die forming of various large-curvature hybrid structure parts, each set of tool can be used repeatedly, and the tool does not need to be customized repeatedly;
(3) the operation is simple: an operator only needs to adjust the adjustable point of the profile of the tool by means of the laser tracker without other additional operations (such as an auxiliary positioning device and the like);
(4) the cost is low: although the die is required to be tested for several times, compared with the situation that the molded surface of the tool is repeatedly repaired or the tool is remade, the invention not only can reduce the cost, but also can shorten the manufacturing period of the part and can be repeatedly used;
(5) the efficiency is high: because the simple operation can restrict the frock adjustment after reaching the ideal profile, can use for a long time under a state, can effectively improve production efficiency.
Drawings
FIG. 1 is a flow chart showing the method for controlling the shape of a large-curvature hybrid component according to the present invention.
Fig. 2 is a perspective view showing a part to be manufactured of the embodiment.
Fig. 3 is a schematic view showing an adjustable region of the molding tool of the embodiment.
Fig. 4 is a schematic diagram showing the structure of an adjustable tool according to an embodiment.
Description of the reference numerals
1: large curvature hybrid structural part (part), 2: shaping frock, 3: adjustable frock, 4: the holder is held.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in conjunction with the accompanying drawings, and is intended to be illustrative and not limiting.
The method for controlling the shape of a hybrid component having a large curvature according to the present embodiment is suitable for a case where a hybrid component having a large curvature (hereinafter, simply referred to as a component) in which a metal and a composite material are bonded to each other is molded by a die molding method. By means of the adjustable tool, the tool profile of the forming tool of the large-curvature hybrid structure part is adjusted, and therefore the precise control of the shape of the part is achieved.
First, a flow of a method for controlling the outer shape of a large-curvature hybrid component according to the present embodiment will be described with reference to fig. 1.
In the method for controlling the external shape of a large-curvature hybrid component according to the present embodiment, first, the external shape characteristics of the component to be manufactured are analyzed (step S1).
Next, simulation analysis is performed, and according to the simulation analysis result and the characteristics of the part, a possible out-of-tolerance area and an out-of-tolerance range in the shape of the part are determined, and design parameters of the molding tool are determined (step S2). Here, the thickness of the molding tool is selected so as to have the rigidity necessary for molding the part and to have a certain degree of adjustability.
Next, the molding tool is manufactured according to the design parameters of the molding tool, and an adjustable point is set at a position of the tool profile of the molding tool corresponding to a possible out-of-tolerance region in the outer shape of the part (step S3).
Then, an adjustable tooling is designed and manufactured according to the appearance characteristics and the easily deformable area of the part (step S4). The adjustable range meets the three-dimensional adjustable requirement, and the material of the adjustable tool is selected according to the adjustable range. In addition, in order to ensure the appearance requirement of the part, the adjustable tool has strong operability and is suitable for detection equipment such as a laser tracker.
Then, according to the shape of the part, the tool profile of the forming tool is adjusted to the theoretical profile required by the part to be manufactured by using the adjustable tool, and the adjusted forming tool is used for forming the part (step S5).
Next, the shape of the part obtained by the adjusted forming tool with the theoretical profile is detected and analyzed to find out an out-of-tolerance region and an out-of-tolerance range (step S6).
Then, the adjustable points of the tool profile corresponding to the found out-of-tolerance areas are adjusted by the adjustable tools, and the parts are molded again by the adjusted molding tools (step S7).
Next, the shape of the obtained part is detected, and the out-of-tolerance region and the out-of-tolerance range are analyzed to determine whether the shape requirement is satisfied (step S8). When the outer shape requirement is satisfied (step S8: Yes), the adjustment of the molding tool is finished to obtain an ideal tool profile of the molding tool (step S9). And (S7) if the shape requirement is not met (step S8: No), adjusting the tool profile, and molding the part again by using the adjusted molding tool until the tool profile of the molding tool completely meeting the shape requirement of the part is obtained.
Here, in step S5 and step S7, it is preferable that the tool surface of the molding tool is detected by using a detection device such as a laser tracker, and it is determined whether or not the tool surface of the molding tool is adjusted to a theoretical surface or a newly required tool surface.
According to the shape control method of the large-curvature hybrid structure part, the precise control of the shape of the large-curvature hybrid structure part can be realized, and the method is strong in controllability, strong in universality, simple to operate, low in cost and high in efficiency.
[ examples ] A method for producing a compound
The method for controlling the outer shape of the large-curvature hybrid component according to the present invention will be described below with reference to specific examples. Fig. 2 is a perspective view showing a part to be manufactured of an embodiment, fig. 3 is a schematic view showing an adjustable region of a molding tool of the embodiment, and fig. 4 is a schematic view showing a structure of the adjustable tool of the embodiment.
The part 1 shown in fig. 2 is a large curvature hybrid structure part of metal to composite material glued, and can be manufactured using negative-forming. Hereinafter, a method of controlling the shape of the part during the manufacturing process will be described.
First, the exterior characteristics of the part 1 to be manufactured are analyzed.
And then, carrying out simulation analysis, determining a possible out-of-tolerance area and an out-of-tolerance range in the appearance of the part 1 according to the simulation analysis result and the part characteristics, and determining design parameters of the forming tool 2. Here, the thickness of the molding tool 2 is selected so as to have rigidity necessary for molding a part and to have a certain degree of adjustability.
Next, the forming tool 2 is manufactured according to the design parameters, and as shown in fig. 3, an adjustable region and an adjustable point are provided at a position of the tool profile of the forming tool 2 corresponding to a possible out-of-tolerance region in the outer shape of the part 1. The number of adjustable points is set according to the extent to which the part 1 is likely to be deformed.
Then, the adjustable tooling 3 is designed and manufactured according to the appearance characteristics and the easily deformable area of the part 1. Here, as shown in fig. 4, a plurality of adjustment mechanisms are used in which a screw hole is provided in a support frame and an adjustment bolt is inserted into the screw hole. And one end of the adjusting bolt is connected to the position of each adjustable point. The tool profile of the forming tool 2 can be adjusted (pushed in or pulled out) by rotating the adjusting bolt. Here, as shown in fig. 4, a holding bracket 4 is provided to hold and support the adjustable tool 3.
Then, according to the shape of the part 1, the tool profile of the forming tool 2 is adjusted to the theoretical profile required by the part 1 to be manufactured by using the manufactured adjustable tool 3, and the tool profile of the forming tool 2 is checked by using a detection device such as a laser tracker. And then, molding the part 1 by using the adjusted molding tool 2, specifically, manually paving and pasting the mixed structure part in which metal and composite materials are glued, checking the vacuum leakage condition before canning, and putting the part into an autoclave for curing after the part meets the requirement.
Then, after the part 1 is cured, demolding and machining are carried out, then the shape of the part 1 obtained by molding the molding tool 2 with the theoretical profile is detected by using detection equipment, an out-of-tolerance area and an out-of-tolerance range are found out according to the detection result, the definition is carried out on the molding tool 2, and meanwhile, the adjustment range of the tool profile is determined according to the out-of-tolerance condition.
Next, according to the new profile requirement, the tool profile of the forming tool 2 is adjusted by the adjustable tool 3, and the tool profile of the forming tool 2 is inspected by using a detection device such as a laser tracker.
Next, the part is molded again using the adjusted molding tool 2 (the specific molding method is the same as above). And then, carrying out appearance detection on the obtained part, analyzing the out-of-tolerance area and the out-of-tolerance range, and judging whether the appearance requirement is met. Under the condition of meeting the appearance requirement, finishing the adjustment of the forming tool 2 to obtain an ideal tool profile of the forming tool. And under the condition that the appearance requirement is not met, adjusting the tool profile of the forming tool 2, forming the part by using the adjusted forming tool 2, and repeating iteration until the tool profile of the forming tool which completely meets the appearance requirement of the part is obtained.
Therefore, the forming tool with the tool molded surface which completely meets the appearance requirement of the part is obtained, and the forming tool can be repeatedly put into part manufacturing.
The above description has been given in detail only for the preferred embodiments of the present invention. Various modifications and additions may be made to the described embodiments or may be substituted in a similar manner by those skilled in the art to which the invention pertains. Further, it is also within the technical scope of the present invention to obtain the same technical effects by dividing, combining, or replacing the order of the steps described above. The technical scope of the present invention is defined by the claims, and the meaning equivalent to the description of the claims and all modifications within the scope thereof are also included.
Claims (4)
1. A method for controlling the appearance of a part with a large curvature hybrid structure is used when the part with the large curvature hybrid structure is molded by adopting a female die molding mode, and is characterized by comprising the following steps:
a part shape analysis step of analyzing the shape of the part to be manufactured;
selecting design parameters of a forming tool, carrying out simulation analysis, determining possible out-of-tolerance areas and out-of-tolerance ranges in the appearance of the part according to simulation analysis results and part characteristics, and determining the design parameters of the forming tool;
manufacturing a forming tool, namely manufacturing the forming tool according to the design parameters of the forming tool, and setting an adjustable point at a position of a tool molded surface of the forming tool, which corresponds to a possible out-of-tolerance area in the shape of the part;
designing and manufacturing an adjustable tool, wherein the adjustable tool is designed and manufactured according to the appearance characteristics and the easily-deformable area of the part;
a part forming step, namely adjusting the tool profile of the forming tool into a theoretical profile required by the part to be manufactured by using the adjustable tool according to the shape of the part, and forming the part by using the adjusted forming tool; and
and a step of controlling the shape of the part, which is to detect and analyze the shape of the part obtained by using the adjusted forming tool to form the theoretical profile, find out an out-of-tolerance region and an out-of-tolerance range, adjust an adjustable point of the tool profile corresponding to the found out-of-tolerance region by using the adjustable tool, form the part by using the adjusted forming tool, then detect and analyze the shape of the manufactured part, adjust the tool profile of the forming tool, and iterate repeatedly until the tool profile of the forming tool completely meets the shape requirement of the part is obtained.
2. The method as claimed in claim 1, wherein the shape of the hybrid structural part is controlled by the shape control unit,
in the selection step of the design parameters of the forming tool, the thickness of the forming tool is selected in a mode of having the rigidity required by part forming and adjustability.
3. The method for controlling the profile of a hybrid structural part with large curvature according to claim 1 or 2,
in the step of part forming, the method further comprises a step 1 of detection and judgment, namely, detecting the adjusted tool profile of the forming tool by using a laser tracker, and judging whether the tool profile of the forming tool is adjusted to be a theoretical profile or not.
4. The method of claim 3, wherein the shape of the hybrid structure part with large curvature is controlled by the control unit,
in the step of controlling the shape of the part, the method further comprises a 2 nd detection and judgment step, namely, detecting the adjusted tool profile of the forming tool by using a laser tracker, and judging whether the tool profile of the forming tool is adjusted to a newly required tool profile.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011260001.1A CN114474774A (en) | 2020-11-12 | 2020-11-12 | Appearance control method for large-curvature hybrid structure part |
| PCT/CN2021/130295 WO2022100689A1 (en) | 2020-11-12 | 2021-11-12 | Method for controlling profile of large-curvature hybrid structure part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011260001.1A CN114474774A (en) | 2020-11-12 | 2020-11-12 | Appearance control method for large-curvature hybrid structure part |
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| CN114474774A true CN114474774A (en) | 2022-05-13 |
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| CN202011260001.1A Pending CN114474774A (en) | 2020-11-12 | 2020-11-12 | Appearance control method for large-curvature hybrid structure part |
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| WO (1) | WO2022100689A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114986929A (en) * | 2022-06-01 | 2022-09-02 | 沈阳飞机工业（集团）有限公司 | Method for improving quality and efficiency of secondary bonding of composite material air inlet channel |
| CN116061464A (en) * | 2022-12-26 | 2023-05-05 | 江西洪都航空工业集团有限责任公司 | Multi-stringer forming device and forming method |
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- 2021-11-12 WO PCT/CN2021/130295 patent/WO2022100689A1/en active Application Filing
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| CN111086132A (en) * | 2019-12-30 | 2020-05-01 | 天津银宝山新科技有限公司 | Plastic grid pre-deformation mold design method |
| CN111605225A (en) * | 2020-03-25 | 2020-09-01 | 海鹰空天材料研究院(苏州)有限责任公司 | Co-bonding curing molding method for large-curvature spherical frame of airplane |
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