Gluing wrinkle control device
By using a bonding wrinkle control device at the joint between the stringer and the skin, including a flexible pressure equalizing element and a sacrificial layer, the problem of edge wrinkles at the joint between the stringer and the skin was solved, achieving efficient manufacturing and cost reduction.
Patent Information
- Application Number
- CN202520088766.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-15
AI Technical Summary
Existing technologies often result in skin fiber wrinkles during the bonding process between the stringers and skin of composite reinforced wall panels, and existing solutions increase the process or cost.
A bonding wrinkle control device, including a flexible pressure equalizing component and a sacrificial layer, is used at the bonding joint between the stringer and the skin. The flexible material eliminates wrinkles at the bonding edge, avoiding the need for chamfering of the stringer edge and the use of cover plates.
It effectively eliminates wrinkles at the joint edges between the stringer and the skin, improves manufacturing efficiency, reduces manufacturing costs, simplifies the process, and enhances the internal quality of the stringer.
Smart Images
Figure CN223671828U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of aircraft manufacturing, especially to a bonding wrinkle control device. BACKGROUND
[0002] Composite stiffened panel is one of the important structural components of aircraft structure, and plays a relatively excellent role in weight reduction and improvement of aircraft structure load bearing capacity. At present, the composite stiffened panel is usually cured and formed by the process scheme of co-bonding the cured dry stringer and the uncured wet skin. Taking a T-shaped stringer stiffened panel as an example, the main process route is: firstly, curing and forming the T-shaped stringer, then placing the cured T-shaped stringer to the predetermined position of the laid skin for bonding, laying auxiliary materials and making a vacuum bag after the bonding is completed, and finally entering a hot press tank to complete the part forming. However, after the stringer and the skin are bonded, due to the step difference between the stringer edge and the skin, the internal pressure is uneven during curing, the resin in the bonding edge area is gathered on the skin surface, the internal fibers are displaced, and therefore the skin fiber wrinkle is generated.
[0003] In order to solve the generation of the stringer and skin bonding edge wrinkle, there are generally two kinds of schemes: one is to slow down the step difference by processing the stringer edge with an inverted bevel, and to improve the bridging by gentle transition; the other is to use a cover plate between the stringers as a whole, and to make the pressure evenly dispersed during curing to prevent the bridging phenomenon. However, for the first scheme, on the one hand, the inverted bevel process increases the process flow and the risk of damage to the stringer itself, and on the other hand, due to the residual step of the bevel edge which is difficult to avoid in the inverted bevel process, slight bridging still occurs, and the stringer and skin bonding edge wrinkle can only be improved but cannot be eliminated; for the second scheme, the cover plate itself has high manufacturing requirements and is easy to be damaged, and the use of the cover plate not only increases the process flow and reduces the production efficiency, but also increases the production cost. Therefore, both schemes have non-negligible drawbacks.
[0004] Therefore, in order to solve the quality problem of the skin wrinkle caused by the bridging of the stringer and skin bonding edge, and to reduce the cost and increase the efficiency, a simple device with low cost and easy operation needs to be developed. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a bonding wrinkle control device, which has simple structure, is convenient to use, and can better solve the quality problem of the skin wrinkle caused by the bridging of the stringer and skin bonding edge.
[0006] To achieve this purpose, the utility model adopts the following technical scheme:
[0007] The utility model discloses a kind of cementation wrinkle control devices, the cementation wrinkle control device is installed at the cementation of stringer and skin, the cementation wrinkle control device includes: pressure equalizing piece, the pressure equalizing piece is flexible material piece, the pressure equalizing piece has adjacent first side wall and second side wall, the first side wall is set, the second side wall is set to the end surface of the stringer corresponding, the upper surface of the skin corresponding;Sacrificial layer, the sacrificial layer is clamped in the second side wall and the upper surface of the skin setting.
[0008] In some embodiments, the cross section of the pressure equalizing piece is any one of rectangle, triangle and trapezoid.
[0009] In some embodiments, along the length direction of the stringer, the size of the pressure equalizing piece is not less than the length of the stringer.
[0010] In some embodiments, along the thickness direction of the stringer, the size of the pressure equalizing piece is less than the thickness of the stringer.
[0011] In some embodiments, the sacrificial layer includes a glue layer.
[0012] In some embodiments, the pressure equalizing piece includes sub-components spliced in sequence along the length direction of the stringer.
[0013] In some specific embodiments, two adjacent sub-components are bonded; or, among two adjacent sub-components, one sub-component is provided with a clamping convex, and the other sub-component is provided with a clamping hole, and the clamping convex is fitted in the clamping hole.
[0014] In some embodiments, the cementation wrinkle control device further includes a protective film wrapped on the pressure equalizing piece, the protective film is used to maintain the shape of the pressure equalizing piece, and isolate the first side wall and the end surface of the stringer.
[0015] In some specific embodiments, the protective film forms a wrapping part and an overlapping part after being wrapped on the pressure equalizing piece, the wrapping part is wrapped on the pressure equalizing piece, and the overlapping part is arranged beyond the pressure equalizing piece.
[0016] In some embodiments, the cementation wrinkle control device further includes an isolation film, and the isolation film covers the sacrificial layer.
[0017] The gluing wrinkle control device has the beneficial effects that: in the actual working process, the sacrificial layer is laid on the upper surface of the skin, the pressure equalizing piece is placed at the joint position of the longeron and the skin and is fixed, bagging and vacuumizing are then performed, and then the parts are sent to the hot pressing tank to complete the curing and molding.
[0018] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS
[0019] Fig. 1 is a cooperation structure schematic view of the gluing wrinkle control device of the present application embodiment and the longeron and the skin;
[0020] Fig. 2 is a partial sectional view of the cooperation structure of the gluing wrinkle control device of the present application embodiment and the longeron and the skin;
[0021] Fig. 3 is a structure schematic view of the pressure equalizing piece and the protective film of the present application embodiment.
[0022] Reference signs:
[0023] 100, gluing wrinkle control device; 110, pressure equalizing piece; 120, sacrificial layer; 130, isolation film; 140, protective film; 141, wrapping part; 142, overlapping part;
[0024] 200, longeron;
[0025] 300, skin. DETAILED DESCRIPTION
[0026] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, but not all the structures.
[0027] In the description of the utility model, unless another definite provision and limitation, the term "connect", "connection", "fixed" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two elements of the interaction relationship.For the ordinary skill in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] In the description of the embodiment, the orientation or position relationship of the terms "upper", "lower", "left", "right", "front", "back" and the like is based on the orientation or position relationship shown in the drawing, which is only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0029] As shown in Figs. 1 to 3 The utility model discloses a kind of cementation wrinkle control devices 100, cementation wrinkle control device 100 is installed at the cementation of stringer 200 and skin 300, cementation wrinkle control device 100 includes pressure equalizing piece 110 and sacrifice layer 120, pressure equalizing piece 110 is flexible material piece, pressure equalizing piece 110 has adjacent first side wall and second side wall, first side wall is set corresponding to the end surface of stringer 200, second side wall is set corresponding to the upper surface of skin 300, sacrifice layer 120 is clamped in second side wall and the upper surface of skin 300 setting. It can be understood that, in actual working process, first sacrifice layer 120 is laid on the upper surface of skin 300, and pressure equalizing piece 110 is placed to the junction position of stringer 200 and skin 300 and is fixed, then bagging is carried out and vacuumizing, then the part is sent to hot press tank to complete solidification forming. Since pressure equalizing piece 110 is flexible material piece, and fixed in the junction position of stringer 200 and skin 300 can effectively eliminate stringer 200 and skin 300 cementation edge skin wrinkle, improve the quality inside stringer 200, while avoiding the use of stringer cover plate of prior art, also need not chamfering on the edge of stringer 200, reduce manufacturing process, improve manufacturing efficiency. In addition, since the structure of cementation wrinkle control device 100 is simple, long stringer cover plate is not used, and chamfering is not needed on the edge of stringer 200, manufacturing cost is reduced.
[0030] Optionally, the cross section of pressure equalizing piece 110 is any one of rectangle, triangle, trapezoid. Of course, in other embodiments of the utility model, the shape of pressure equalizing piece 110 can be adjusted according to actual needs.
[0031] Optionally, the size of the pressure-equalizing piece 110 is not less than the length of the stringer 200 along the length direction of the stringer 200. Thus, the stringer 200 and the skin 300 can be more effectively prevented from being wrinkled at the bonding edge, and the internal quality of the stringer 200 can be improved.
[0032] In some embodiments, the size of the pressure-equalizing piece 110 is less than the thickness of the stringer 200 along the thickness direction of the stringer 200. It can be understood that, in actual operation, the stringer 200 and the skin 300 need to be cured after being bagged and vacuumized, that is, a vacuum bag is sleeved on the outside of the stringer 200 and the skin 300. The size of the pressure-equalizing piece 110 is less than the thickness of the stringer 200 along the thickness direction of the stringer 200, so that the excessively thick pressure-equalizing piece 110 can be prevented from affecting the normal sleeving of the vacuum bag.
[0033] Optionally, the sacrificial layer 120 comprises a glue layer. Of course, in other embodiments of the present application, the sacrificial layer 120 can also be made of a material which is convenient to trim and can be in contact with the stringer 200 and the skin 300. After curing of the parts, the sacrificial layer 120 can be easily removed without damaging the stringer 200 and the skin 300.
[0034] Optionally, the pressure-equalizing piece 110 comprises sub-components which are sequentially spliced along the length direction of the stringer 200. Thus, the pressure-equalizing piece 110 can be assembled according to actual needs, so that the manufacturing and installation of the pressure-equalizing piece 110 can be further facilitated.
[0035] Further optionally, the two adjacent sub-components are connected by bonding. Thus, the assembly of the pressure-equalizing piece 110 can be facilitated, and the structural stability of the entire pressure-equalizing piece 110 can be improved, so that the phenomenon of breakage of the pressure-equalizing piece 110 can be avoided. In an alternative embodiment, one of the two adjacent sub-components is provided with a clamping protrusion, and the other is provided with a clamping hole, and the clamping protrusion is fitted into the clamping hole. Thus, the assembly of the pressure-equalizing piece 110 can be facilitated, and the structural stability of the entire pressure-equalizing piece 110 can be improved, so that the phenomenon of breakage of the pressure-equalizing piece 110 can be avoided. Of course, in other embodiments of the present application, the connection mode of the two adjacent sub-components can be adjusted as needed.
[0036] Optionally, with reference to Fig. 2 and Fig. 3As shown, the adhesive wrinkling control device 100 further comprises a protective film 140 wrapped on the pressure equalizing piece 110, which is used to maintain the shape of the pressure equalizing piece 110 and isolate the first side wall from the end surface of the longeron 200. It can be understood that the protective film 140 is wrapped outside the pressure equalizing piece 110, which is more conducive to maintaining the original shape of the pressure equalizing piece 110 and plays a role of isolation from the longeron 200 and the skin 300, thereby facilitating demolding after curing. In the embodiment of the utility model, the material and thickness of the protective film 140 can be selected according to actual needs, and the related parameters of the protective film 140 are not limited here.
[0037] Further, the protective film 140 is wrapped on the pressure equalizing piece 110 to form a wrapping portion 141 and an overlapping portion 142. The wrapping portion 141 is wrapped on the pressure equalizing piece 110, and the overlapping portion 142 is arranged beyond the pressure equalizing piece 110. It can be understood that the wrapping portion 141 can stably protect the pressure equalizing piece 110, and the excess overlapping portion 142 can be connected with the sacrificial layer 120, which is conducive to improving the stability.
[0038] Optionally, referring to Fig. 2 As shown, the adhesive wrinkling control device 100 further comprises an isolation film 130 covering the sacrificial layer 120. The isolation film 130 can ensure that the sacrificial layer 120 is easily removed after the part is cured without damaging the longeron 200 and the skin 300.
[0039] Taking a T-shaped longeron stiffened panel (hereinafter referred to as T-shaped longeron) as an example, the specific implementation steps of the adhesive wrinkling control device 100 of the utility model for controlling the adhesive edge skin wrinkling of the longeron 200 are as follows:
[0040] First step: T-shaped longeron preparation, taking out the cured T-shaped longeron for drying and waiting for gluing;
[0041] Second step: the thickness of the T-shaped longeron edge strip is 2.96 mm. The thickness D of the flexible material is set to 3 mm, and the width W is set to 6 mm. The protective film 140 is used to wrap the flexible material, and the pressure equalizing piece 110 is completed;
[0042] Third step: lay the adhesive film on the T-shaped longeron gluing surface and place it at the predetermined gluing position;
[0043] Fourth step: lay a layer of sacrificial layer 120 that can be removed after curing on the T-shaped longeron end gluing edge position, and cover a layer of isolation film 130 on top;
[0044] Fifth step: place the pressure equalizing piece 110 at the gluing edge position, with the side completely wrapped by the protective film 140 placed at the gluing edge of the T-shaped longeron and the skin 300, and then fix the pressure equalizing piece 110 to prevent displacement during bag making and vacuumizing;
[0045] Sixth step: after placing the isolation film 130 and the air-permeable felt auxiliary material, vacuumizing and bagging is performed;
[0046] Seventh step: the part is sent to a hot press tank to complete curing and molding;
[0047] Eighth step: the cured T-shaped stringer is demolded, and the surface quality of the bonded edge skin 300 is checked, and the surface is smooth without glue accumulation;
[0048] Ninth step: the bonded edge is cut and sampled, and the internal fiber quality of the skin 300 is observed.
[0049] The advantages of the bonding wrinkle control device 100 of the embodiment are as follows:
[0050] First: effectively eliminating the skin wrinkle of the bonded edge skin of the stringer 200 and the skin 300, and improving the internal quality of the stringer 200.
[0051] Second: avoiding the use of the stringer cover plate, and eliminating the stringer 200 edge chamfering process, reducing the manufacturing process flow, and improving the manufacturing efficiency;
[0052] Third: avoiding the manufacturing and loss of the stringer cover plate, or eliminating the process of chamfering the edge of the stringer, and reducing the manufacturing cost.
[0053] In the description of the specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0054] Obviously, the above embodiments of the utility model are only for clear illustration of the utility model, and are not a limitation on the implementation manner of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments, and replacements can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to exhaust all the implementation manners. Any modification, equivalent replacement, and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A cemented wrinkle control device characterized by, The glue joint wrinkle control device is installed at a glue joint between a longeron (200) and a skin (300), and comprises: a pressure equalizing member (110) made of a flexible material, the pressure equalizing member (110) having a first side wall and a second side wall adjacent to each other, the first side wall being arranged corresponding to an end surface of the longeron (200), and the second side wall being arranged corresponding to an upper surface of the skin (300); a sacrificial layer (120) arranged between the second side wall and the upper surface of the skin (300).
2. The cemented wrinkle control device of claim 1, wherein, The pressure equalizing member (110) has a cross section in any one of a rectangle, a triangle and a trapezoid.
3. The cemented wrinkle control device of claim 1, wherein, The pressure equalizing member (110) has a size not less than a length of the longeron (200) along a length direction of the longeron (200).
4. The cemented wrinkle control device of claim 1, wherein, The pressure equalizing member (110) has a size less than a thickness of the longeron (200) along a thickness direction of the longeron (200).
5. The cemented wrinkle control device of claim 1, wherein, The sacrificial layer (120) comprises a glue layer.
6. The cemented wrinkle control device of any of claims 1-5, wherein, The pressure equalizing member (110) comprises sub-components sequentially spliced along the length direction of the longeron (200).
7. The cemented wrinkle control device of claim 6, wherein, Two adjacent sub-components are bonded to each other; or One of the two adjacent sub-components is provided with a clamping protrusion, and the other is provided with a clamping hole, the clamping protrusion being fitted into the clamping hole.
8. The cemented wrinkle control device of any of claims 1-5, wherein, The glue joint wrinkle control device further comprises a protective film (140) wrapped on the pressure equalizing member (110), the protective film (140) being used to maintain a shape of the pressure equalizing member (110) and to isolate the first side wall from the end surface of the longeron (200).
9. The cemented wrinkle control device of claim 8, wherein, After the protective film (140) is wrapped on the pressure equalizing member (110), a wrapping portion (141) and an overlapping portion (142) are formed, the wrapping portion (141) being wrapped on the pressure equalizing member (110), and the overlapping portion (142) being arranged beyond the pressure equalizing member (110).
10. The cemented wrinkle control device of any of claims 1-5, wherein, The glue joint wrinkle control device further comprises an isolation film (130) covering the sacrificial layer (120).