CN211441240U - Combined material "U" type stringer wallboard integrated into one piece frock - Google Patents
Combined material "U" type stringer wallboard integrated into one piece frock Download PDFInfo
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- CN211441240U CN211441240U CN201922011674.2U CN201922011674U CN211441240U CN 211441240 U CN211441240 U CN 211441240U CN 201922011674 U CN201922011674 U CN 201922011674U CN 211441240 U CN211441240 U CN 211441240U
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Abstract
The utility model discloses a combined material "U" type stringer wallboard integrated into one piece frock belongs to the aeronautical manufacturing technology field. The utility model comprises a middle prefabricated body forming tool, which comprises two L-shaped side plates and a forming bottom plate; the stringer forming tool comprises an L-shaped structure and a U-shaped structure; the skin forming tool is a rectangular straight plate, and multiple groups of symmetrically arranged middle prefabricated body positioning components are arranged on the skin forming tool. The technical scheme of the utility model the stringer web positioning process has been simplified to guaranteed the accurate control of middle preform and covering relative position, thereby ensured the location of stringer web accurate and size precision control, the shaping technological method that provides and frock can be applicable to multiple combined material and add the muscle wallboard structure, have improved combined material finished piece structure shaping quality.
Description
Technical Field
The utility model belongs to the technical field of the aeronautical manufacturing, concretely relates to combined material "U" type stringer wallboard integrated into one piece frock.
Background
As a novel reinforced wallboard structure, the U-shaped long-truss wallboard structure made of the composite material of the airplane is characterized in that a layer paved at the bottom of a long truss is completely laminated with a skin, the bonding area far larger than that of the T-shaped long-truss reinforced wallboard is obtained, the problem that the whole wallboard structure is influenced due to degumming of the long truss is effectively solved, and the whole curing molding of the wallboard structure can be completed by adopting a co-curing or co-bonding process.
In the forming process of the U-shaped stringer wallboard structure, the forming tool is very important for effectively transmitting external pressure, controlling layering and pore defects and ensuring accurate stringer positioning and dimensional precision, in particular to the preforming and curing tool of the stringer structure.
According to the results of patent database search, the forming of the composite material U-shaped stringer wallboard involves more patents, including a large number of patents of the same family related to air passenger companies.
CN201610210307.3 discloses a "mandrel-free U-shaped unit stiffened wall plate autoclave integral forming method", mainly relating to a mandrel-free U-shaped unit stiffened wall plate autoclave integral forming method, which is suitable for a specific wall plate composition structure without a mandrel, an intermediate intercalation and a twister strip, and has no relation to a forming tool. The patent US 11/364,494 entitled "Process of manufacturing composite panels with U-shaped manufacturing members", the patent US 10/992,221 entitled "Self-configuring panels of prefabricated composite and manufacturing processes for composites of subclause panels", and the patent EP1972427B1 entitled "Method for manufacturing panels of composite materials with U-shaped manufacturing members" belong to the same patent application family of the air passenger company, and relate to a co-curing integral molding Method for U-shaped stringer stiffened panel configurations, including a co-curing integral molding Method with two structures in the middle, and do not relate to a stringer and skin positioning device. The device and the method for preforming the U-shaped composite stringer blank disclosed in CN103950209A mainly relate to a ply pre-pressing forming process, and do not mention the integral curing of the stiffened wall panel.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the patent relates to an integral forming tool for a U-shaped stringer wallboard made of an aircraft composite material, which simplifies the assembly and positioning process of a stringer web plate, and ensures the accurate control of the relative position of a stringer prefabricated body and a skin, thereby ensuring the accurate positioning and the dimensional precision control of the stringer web plate.
According to the technical scheme of the utility model, a "U" type stringer wallboard integrated into one piece frock is provided, a serial communication port, include:
the middle prefabricated part forming tool is used for forming a middle prefabricated part in advance and comprises two L-shaped side plates and a forming bottom plate;
the stringer forming tool is used for forming a stringer and comprises an L-shaped structure and a U-shaped structure;
the skin forming tool is used for forming the skin paving layer covered on the skin forming tool and is a rectangular flat plate,
the skin forming tool is provided with a plurality of groups of symmetrically arranged middle prefabricated body positioning components.
Furthermore, the L-shaped side plate comprises a vertical surface and a horizontal surface, the cross section is L-shaped, a certain chamfer exists, and the chamfer is 3-5 mm; the prefabricated body forming bottom plate is a rectangular flat plate.
Furthermore, the middle prefabricated part positioning components are symmetrically arranged on two side edges where the stringer web plates are located on the skin forming tool and used for positioning the position of the middle prefabricated part.
Further, the middle preform positioning component is a clamping unit or a positioning groove.
Furthermore, when the middle prefabricated part positioning component is a positioning groove, rectangular and triangular protruding blocks are arranged on two sides of the stringer occupying line outside the skin forming tool net size line, and the corresponding position of the middle prefabricated part is a concave area with a corresponding shape.
Furthermore, the intermediate preform is an I-shaped intermediate preform and comprises a group of long truss web plate insertion layers and two groups of small triangular twill strips.
Furthermore, the intermediate preform is a type II intermediate preform and comprises two groups of insertion layers along the stringer web and a group of filling of large triangular twiddle strips.
Furthermore, the intermediate preform is a type III intermediate preform and comprises two groups of insertion layers along the stringer web and a group of filling strips of the trapezoidal twister.
Furthermore, the intermediate preform is an IV-type intermediate preform and comprises a group of large triangular twill fillings.
Furthermore, the intermediate prefabricated body is a V-shaped intermediate prefabricated body and comprises a group of long truss web plate insertion layers and a group of trapezoid twill strips.
The utility model has the advantages that:
1) based on the technical scheme of the utility model, the integral structure of the U-shaped stringer wallboard adopts a step-by-step integral curing process through the intermediate prefabricated body forming tool, the stringer forming tool and the skin forming tool, thereby effectively ensuring the forming quality of the U-shaped stringer corner area and preventing the problems of layering, folding, inclusion and pore defects;
2) the U-shaped stringer walls are hardened to form a middle prefabricated body positioning component reserved on a molding tool, the structure is utilized to simplify the stringer web plate assembling and positioning process, and the accurate control of the relative position of the middle prefabricated body and the skin is ensured, so that the accurate positioning and size precision control of the stringer web plate are ensured, and the problems that in the traditional method, the unit laying layers on two sides need to be repositioned and combined after being taken down by a laying die, the precision is not easy to guarantee, and the process is long and complicated are solved.
Drawings
FIG. 1 shows a schematic view of an I-shaped intermediate preform and a molding tool;
FIG. 2 shows a schematic view of a type II intermediate preform and a molding tool;
FIG. 3 shows a schematic view of a type III intermediate preform and a molding tool;
FIG. 4 shows a schematic view of an IV-type intermediate preform and a molding tool;
FIG. 5 shows a schematic view of a V-shaped intermediate preform and a forming tool;
FIG. 6 shows a schematic view of an integral assembling and forming tool for a U-shaped stringer wallboard;
FIG. 7 shows a schematic view of stringer layup positioning.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in order to provide the public with a better understanding of the present invention, some details of the specific structure are set forth in the following description of the invention. It will be apparent to one skilled in the art that an understanding of the present invention may be practiced without these specific details.
The utility model relates to an aircraft combined material "U" type stringer wallboard integrated into one piece frock when guaranteeing "U" type stringer location accuracy, has ensured that intercalation and R angle region spread layer quality effective control in the middle of the stringer, can be used for "U" type stringer to add the muscle wallboard joint integrated into one piece, effectively simplifies the process control flow, and the shaping frock that provides can be applicable to the long purlin structural grouping of multiple "U" type, has improved combined material finished piece structure shaping quality.
The invention relates to a U-shaped stringer wallboard integral forming tool, which comprises:
the middle prefabricated part forming tool 6 is used for forming a middle prefabricated part;
the stringer forming tool 3 is used for forming a stringer;
a skin forming tool 5 for forming the skin paving layer covered on the skin forming tool,
the skin forming tool 5 is provided with a plurality of positioning components for positioning the position of the middle prefabricated body.
As shown in fig. 1 to 5, the intermediate preform molding tool comprises two L-shaped side plates and a molding bottom plate, wherein each L-shaped side plate comprises a vertical surface and a horizontal surface, the cross section of each L-shaped side plate is L-shaped, a certain chamfer exists, and the chamfer is 3mm-5 mm; the prefabricated body forming bottom plate is a rectangular flat plate.
The intermediate preform molding method comprises the following steps: reversely placing two L-shaped side plates on the prefabricated body forming bottom plate to form an insertion space of the middle prefabricated body 1 between the vertical surfaces of the two L-shaped side plates; combining the intermediate intercalation layer and the twister strip as required, and after placing the intermediate intercalation layer and the twister strip into the insertion space, integrally combining and packaging; completing the vacuum packaging of the layer combination by using a vacuum auxiliary material; and (3) packaging the layer combination under the given temperature and pressure of 120-180 ℃ and 0.5-0.8 MPa to finish the curing and forming process, removing the forming tool of the intermediate preform, and demoulding to form the intermediate preform 1.
As shown in fig. 6, the stringer molding tool 3 includes "L" and "U" shaped structures. The skin forming tool 5 is a rectangular flat plate, and a plurality of positioning parts are symmetrically arranged on two side sides of the long truss web positioning position on the skin forming tool 5 and used for positioning the middle prefabricated part. The positioning component is a clamping unit or a positioning groove. Fig. 7 shows an embodiment using positioning grooves, when the positioning component is a preform positioning groove 7, rectangular and triangular protruding blocks are arranged on two sides of a stringer occupying line outside the net dimension line of the skin forming tool, and a corresponding position of a middle preform is a concave area with a corresponding shape.
The structure is utilized to simplify the assembling and positioning process of the stringer web, and the accurate control of the relative position of the middle prefabricated body and the skin is ensured, so that the accurate positioning and the dimensional precision control of the stringer web are ensured, the problems that in the traditional method, the unit laying layers on the two sides need to be repositioned and combined after being taken down by the laying die, the precision is not easy to guarantee, and the process is long and tedious are avoided.
The stringer forming method comprises: paving and stacking a skin laying layer on a skin forming tool; positioning the prefabricated and molded middle prefabricated part through a positioning component; laying stringer layups between adjacent intermediate preforms; placing a stringer forming tool on the laid stringer laying layer, and integrally combining and packaging; and (4) packaging the whole assembly under a given temperature and pressure to complete co-curing molding, and removing the stringer molding tool and the skin molding tool for demolding.
Examples
The utility model relates to a 5 kinds of middle prefabricated body structures altogether, the middle prefabricated body of different configurations and shaping frock are shown as figure 1 ~ 5. In the process of forming the prefabricated body, preformed intermediate intercalation and twill strips are combined according to requirements, and then are integrally combined and packaged by using a given forming tool, and the process of curing and forming is completed under the pressure of a given temperature.
As shown in FIG. 1, the I-shaped intermediate preform comprises a set of insert layers inserted along the stringer web and two sets of small triangular twill strips.
As shown in fig. 2, the type II intermediate preform includes two sets of intercalated stringer webs and a set of large triangular twill fill.
As shown in fig. 3, a type III intermediate preform includes two sets of intercalated stringer webs and a set of filled trapezoidal twill strips.
As shown in fig. 4, the type IV intermediate preform, includes a set of large triangular twill fill.
As shown in FIG. 5, the V-shaped intermediate preform includes a set of interlaces along the stringer webs and a set of trapezoidal twill fills.
After the U-shaped stringer wallboard is formed in a laying mode and unit combination mode through the wallboard forming tool shown in the figure 6, the solidified intermediate prefabricated body is placed according to design requirements, and the wallboard structure is integrally assembled and formed.
FIG. 7 shows a schematic view of stringer layup positioning. As shown in fig. 7, in the process of assembling the U-shaped stringer, the cured intermediate preform and the stringer laying layer are placed on the already-laid skin laying layer, and the preform positioning groove 7 preset by the skin forming tool shown in fig. 6 is used for completing the precise control of the relative position of the required stringer preform and the skin laying member, so that the accurate positioning and the dimensional precision control of the stringer web are ensured.
Compared with the prior art, the utility model discloses main technical advantage analysis is as follows:
1. this application technical scheme makes longpurlin intermediate prefabricating body solidification in advance shaping through middle prefabricating body shaping frock, has effectively ensured the regional shaping quality of "U" type longpurlin turning, prevents layering, fold, mix with and the hole defect problem from appearing.
2. In the curing process of the composite material reinforced wall plate in the prior art, the stringer unit laying layers on the two sides are taken down by the laying tool die and transferred to the curing tool to be repositioned and combined, the precision is not easy to guarantee, the process is complicated, the positioning accuracy of the stringer axis is influenced, and the situation that the stringer axis and the straightness cannot meet the requirements easily occurs. According to the technical scheme, the arrangement of the middle prefabricated part positioning component on the forming tool ensures accurate control of the relative position of the middle prefabricated part and the skin, so that accurate positioning of the stringer web and overall size precision control of the wallboard structure are ensured.
While embodiments of the present invention have been presented herein, it will be appreciated by those skilled in the art that changes may be made to the embodiments herein without departing from the spirit of the invention. The above-described embodiments are merely exemplary and should not be taken as limiting the scope of the invention.
Claims (10)
1. The utility model provides a long purlin wallboard integrated into one piece frock of "U" type which characterized in that includes:
the middle prefabricated part forming tool is used for forming a middle prefabricated part and comprises two L-shaped side plates and a forming bottom plate;
the stringer forming tool is used for forming a stringer and comprises an L-shaped structure and a U-shaped structure;
the skin forming tool is used for forming the skin paving layer covered on the skin forming tool and is a rectangular flat plate,
the skin forming tool is provided with a plurality of groups of symmetrically arranged middle prefabricated body positioning components.
2. The integral forming tool for the U-shaped stringer wallboard of claim 1, wherein the L-shaped side plate comprises a vertical surface and a horizontal surface, the cross section is L-shaped, a certain chamfer exists, and the chamfer is 3mm-5 mm; the prefabricated body forming bottom plate is a rectangular flat plate.
3. The tooling of claim 1, wherein the positioning parts of the intermediate prefabricated body are symmetrically arranged on two sides of the skin forming tooling where the stringer web is located, and are used for positioning the position of the intermediate prefabricated body.
4. The integrated forming tool for the U-shaped stringer wallboard of claim 3, wherein the middle prefabricated body positioning component is a clamping unit or a positioning groove.
5. The tooling of claim 4, wherein when the positioning component of the intermediate preform is a positioning groove, rectangular and triangular convex blocks are respectively arranged at two sides of the stringer occupying line outside the net dimension line of the skin forming tooling, and the corresponding position of the intermediate preform is a concave area with a corresponding shape.
6. The tooling of claim 2, wherein the intermediate preform is an I-shaped intermediate preform comprising a set of small triangular twill strips inserted along the stringer web.
7. The tooling of claim 2, wherein the intermediate preform is a type II intermediate preform comprising two sets of insert plies along the stringer web and a set of large triangular twister strips.
8. The tooling of claim 2, wherein the intermediate preform is a type III intermediate preform comprising two sets of insert plies along the stringer web and a set of trapezoidal twill fill.
9. The tooling of claim 2, wherein the intermediate preform is an IV-type intermediate preform comprising a set of large triangular twill fill.
10. The tooling of claim 2, wherein the intermediate preform is a V-shaped intermediate preform comprising a plurality of layers of material inserted along the stringer web and a plurality of layers of material filled with trapezoidal twill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011674.2U CN211441240U (en) | 2019-11-20 | 2019-11-20 | Combined material "U" type stringer wallboard integrated into one piece frock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922011674.2U CN211441240U (en) | 2019-11-20 | 2019-11-20 | Combined material "U" type stringer wallboard integrated into one piece frock |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111070724A (en) * | 2019-11-20 | 2020-04-28 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Integral forming method and tool for composite material U-shaped stringer wallboard |
| CN112406131A (en) * | 2020-10-30 | 2021-02-26 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | U-shaped co-curing stringer, stiffened wall plate and forming method thereof |
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2019
- 2019-11-20 CN CN201922011674.2U patent/CN211441240U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111070724A (en) * | 2019-11-20 | 2020-04-28 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Integral forming method and tool for composite material U-shaped stringer wallboard |
| CN111070724B (en) * | 2019-11-20 | 2021-08-17 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Integral forming method and tool for composite material U-shaped stringer wallboard |
| CN112406131A (en) * | 2020-10-30 | 2021-02-26 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | U-shaped co-curing stringer, stiffened wall plate and forming method thereof |
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