Modular flexible hinge and method for manufacturing the same

Abstract

The application discloses a kind of modular flexible hinge and preparation method thereof, belong to spacecraft flexible solar cell wing manufacturing technical field, comprising: S1, glass fibre aluminium foil is bonded on the corresponding area of lower polyimide film upper surface hinge hole;S2, first solidification forming;S201, polyimide film upper surface is superimposed glass fibre prepreg;S202, in glass fibre prepreg and glass fibre aluminium foil upper surface superimposed upper polyimide film;S203, using groove ETFE board material and ETFE stick material are first solidification forming to obtain the hinge semi-finished product with semicircle arc;S3, second lamination solidification forming;S301, in upper polyimide film upper surface superimposed glass fibre prepreg;The width of overlapping area of glass fibre aluminium foil and glass fibre prepreg is 3mm;S302, fold hinge semi-finished product.The application can solve the problems that existing flexible solar wing hinge is easy to tear and easy to deform in configuration.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of spacecraft flexible solar cell wing manufacturing, and particularly relates to a modular flexible hinge and a preparation method thereof. BACKGROUND

[0002] At present, most of the spacecraft solar wings at home and abroad adopt a rigid configuration scheme, which needs to be configured with a rigid substrate matched with a spring hinge, and has problems of large unit area weight, low storage ratio, large folding envelope size, etc., which cannot match the actual needs of the present stage spacecraft mass production, batch launch and network deployment.

[0003] In order to meet the development needs of the present stage spacecraft, a stacking storage solar cell wing scheme based on a flexible substrate and a flexible hinge configuration has emerged, and the configuration scheme of the flexible substrate matched with the flexible hinge not only has small unit area mass, but also can simultaneously consider the index advantages of the storage ratio and the folding envelope, and has a wide application prospect. However, the existing flexible solar wing hinge, such as the patent application number 202010600250.4, has problems of easy tearing and easy deformation of the hinge hole in the configuration, and has many problems such as complicated process and difficulty in batch production in the preparation method. SUMMARY

[0004] In order to solve the technical problems in the prior art, the application provides a modular flexible hinge and a preparation method thereof, which are used to solve the problems of the existing flexible solar wing hinge, such as easy tearing and easy deformation of the hinge hole in the configuration, and many problems such as complicated process and difficulty in batch production in the preparation method.

[0005] The first object of the application is to provide a modular flexible hinge, which comprises:

[0006] S1, bonding a long strip-shaped glass fiber aluminum foil on the corresponding area of the hinge hole on the upper surface of the lower polyimide film;

[0007] S2, first curing and forming; specifically:

[0008] S201, stacking a glass fiber prepreg on the upper surface of the polyimide film, one side wall of the glass fiber prepreg being attached to one side wall of the glass fiber aluminum foil;

[0009] S202, stacking an upper polyimide film on the upper surface of the glass fiber prepreg and the glass fiber aluminum foil; the overlapping area of the upper polyimide film and the glass fiber aluminum foil has a width of 3mm;

[0010] S203, the first curing forming is carried out by using the recessed ETFE plate and the ETFE rod to obtain a hinge semi-finished product with a semicircular arc; wherein: the upper surface of the recessed ETFE plate is provided with a semicircular recess with a diameter R, and the radius r of the ETFE rod is less than R;

[0011] S3, second lamination curing forming; specifically:

[0012] S301, the glass fiber prepreg is stacked on the upper surface of the upper polyimide film; the overlapping area width of the glass fiber aluminum foil and the glass fiber prepreg is 3mm;

[0013] S302, the hinge semi-finished product is folded in half with the symmetric plane of the semicircular arc as the reference surface.

[0014] Preferably, it further comprises: S4, according to the actual application condition, the product after the second lamination curing forming is cut.

[0015] Preferably, the upper surface of the glass fiber prepreg is coplanar with the upper surface of the glass fiber aluminum foil.

[0016] Preferably, the thickness of the polyimide film is 50 microns.

[0017] Preferably, when the diameter of the hinge hole is 2mm, the width of the glass fiber aluminum foil is 12.30mm; when the diameter of the hinge hole is not 2mm, the width of the glass fiber aluminum foil is B = πd + 6; wherein: B is the width of the glass fiber aluminum foil, and d is the diameter of the hinge hole.

[0018] Preferably, the thickness of the glass fiber prepreg is 100 microns.

[0019] Preferably, R is equal to 4mm, and r is equal to 3mm.

[0020] The second object of the application is to provide a modular flexible hinge prepared by the modular flexible hinge preparation method.

[0021] The application has the advantages and positive effects that:

[0022] The application uses a 50-micron polyimide film as the main material. A specific size specification of single-sided adhesive glass fiber aluminum foil is used and is bonded to the corresponding area of the clean polyimide film hinge hole; after sequentially stacking 100-micron glass fiber prepreg and 50-micron polyimide film, the first lamination curing forming is carried out; after stacking 100-micron glass fiber prepreg, the lowermost polyimide film is folded in half, and the second lamination curing forming is carried out; and according to the actual application condition, the product is cut.

[0023] The application reconstructs the layered structure at the hinge hole, adds a glass fiber aluminum foil reinforcing layer to improve the tear resistance and shape retention capacity of the hinge hole, and introduces a fiber material pre-impregnation process at the raw material end, which greatly simplifies the bonding operation process in the production process and significantly reduces the difficulty of maintaining the production precision in batches, compared with the liquid adhesive coating process. The use of the modular flexible hinge preparation method provides a good foundation for the batch production and large-scale application of such hinge configurations, reduces the production cost and improves the production efficiency, and finally realizes the batch application of the flexible solar cell wing based on the modular flexible hinge technology in the spacecraft energy system. BRIEF DESCRIPTION OF DRAWINGS

[0024] Fig. 1 The flowchart of the preferred embodiment of the application is used to show the structure in the top view of each step;

[0025] Fig. 2 The flowchart of the preferred embodiment of the application is used to show the structure in the right view of each step;

[0026] Fig. 3 The structure diagram of the first time solidification forming in the preferred embodiment of the application.

[0027] 1, polyimide film; 2, single-sided adhesive glass fiber aluminum foil; 3, glass fiber prepreg; 4, ETFE rod; 5, grooved ETFE plate. DETAILED DESCRIPTION

[0028] In order to further understand the inventive content, characteristics and effects of the application, the following examples are given, and the details are described as follows with reference to the accompanying drawings:

[0029] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the technical solutions in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0030] Please refer to Figs. 1-3 The materials required in the modular flexible hinge manufacturing process include: 50-micron polyimide film 1, single-sided adhesive glass fiber aluminum foil 2, 100-micron glass fiber prepreg 3, 3-mm-diameter ETFE rod 4, and 4-mm-diameter grooved ETFE plate 5.

[0031] The modular flexible hinge manufacturing method described in the application includes four steps of hinge hole reinforcing material bonding, core layer bonding, compression forming, and cutting forming, specifically as follows:

[0032] Step 1, using single-sided back adhesive glass fiber aluminum foil, bonding in the corresponding area of the middle hinge hole of the clean polyimide film. The glass fiber aluminum foil width corresponding to the 2mm hinge hole diameter is about 12.30mm, and the glass fiber aluminum foil width B corresponding to the other hinge hole diameter size d is calculated according to the formula B = πd + 6;

[0033] Step 2, on the basis of step 1, sequentially stack 100 microns of glass fiber prepreg, 50 microns of polyimide film, and ensure that the overlapping area width of the glass fiber aluminum foil is 3mm. As shown in Fig. 2 The above state hinge semi-finished product is placed on the 4mm diameter recessed ETFE plate 5, and the 3mm diameter ETFE rod 4 is used to press into the recess, and the first curing forming can be carried out;

[0034] Step 3, stack 100 microns of glass fiber prepreg on the polyimide film of step 2, fold the polyimide film of step 1, ensure that the overlapping area width of the glass fiber aluminum foil and the glass fiber prepreg is 3mm, and carry out the second lamination curing forming;

[0035] Step 4, according to the actual application condition, the product after the second lamination curing forming is cut into shape (according to the actual application mechanics condition, the hinge hole length can be adjusted, such as the hinge hole length of the end stress concentration area can be appropriately shortened, and the hinge hole length of the middle mechanics condition good area can be appropriately lengthened).

[0036] A modular flexible hinge is obtained by the above-mentioned modular flexible hinge preparation method.

[0037] The above only describes the preferred embodiments of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments are within the scope of the technical solutions of the present application.

Claims

1. A method for preparing a modular flexible hinge, characterized in that, Includes the following steps: S1. A strip of fiberglass aluminum foil (2) is bonded to the corresponding area of ​​the hinge hole on the upper surface of the polyimide film (1) on the lower side; the thickness of the polyimide film (1) is 50 micrometers; when the diameter of the hinge hole is 2 mm, the width of the fiberglass aluminum foil (2) is 12.30 mm; when the diameter of the hinge hole is not 2 mm, the width of the fiberglass aluminum foil (2) is B = πd + 6; where: B is the width of the fiberglass aluminum foil (2) and d is the diameter of the hinge hole; S2, First curing and shaping; specifically: S201. A glass fiber prepreg (3) is superimposed on the upper surface of the polyimide film (1), and one sidewall of the glass fiber prepreg (3) is bonded to one sidewall of the glass fiber aluminum foil (2); the thickness of the glass fiber prepreg (3) is 100 micrometers. S202, A polyimide film (1) is superimposed on the upper surface of the glass fiber prepreg (3) and the glass fiber aluminum foil (2); the width of the overlapping area between the upper polyimide film (1) and the glass fiber aluminum foil (2) is 3 mm; S203. The grooved ETFE plate (5) and ETFE rod (4) are used to perform the first curing and forming to obtain a semi-finished hinge with a semi-circular arc; wherein: the upper surface of the grooved ETFE plate (5) is provided with a semi-circular groove with a diameter of 4mm, and the radius of the ETFE rod (4) is 3mm. S3, Second lamination and curing; specifically: S301. Fiberglass prepreg (3) is superimposed on the upper surface of the polyimide film (1) on the upper side; the width of the overlap area between the fiberglass aluminum foil (2) and the fiberglass prepreg (3) is 3 mm. S302. Using the symmetrical plane of the semi-circular arc as the reference plane, fold the semi-finished hinge in half.

2. The method for manufacturing a modular flexible hinge according to claim 1, characterized in that, Also includes: S4. Cut the product after secondary lamination and curing according to the actual application conditions.

3. The method for manufacturing a modular flexible hinge according to claim 1, characterized in that, The upper surface of the glass fiber prepreg (3) is coplanar with the upper surface of the glass fiber aluminum foil (2).

4. A modular flexible hinge, characterized in that, It is obtained by the modular flexible hinge preparation method according to any one of claims 1-3.

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