Wet winding process for forming a composite tank with a flanged-over end and a forming apparatus therefor

Abstract

The application provides a wet-winding flange-turning composite material cabin forming process and a forming device thereof, and belongs to the technical field of composite material cabin forming. The problem that the wet-winding cabin can only produce the cabin without flanges due to the characteristics of the wet-winding process is solved, but more and more products need to be connected or supported by the flange face. The forming process is simple in operation, the winding machine is used for winding forming process, the process is stable, the deficiency that the wet-winding composite material cabin section cannot be integrally formed with the flange is solved, and the application range of the wet-winding composite material cabin section is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of composite material cabin forming, in particular relates to a wet winding flip flange composite material cabin forming process and its forming device. BACKGROUND

[0002] The composite material cabin is a kind of bearing structure frequently used in the field of composite material preparation at present, has very high structural efficiency, and is mainly used in special fields such as missile body structure cabin section, rocket body structure cabin section and load-bearing cylinder.

[0003] The cabin is usually prepared by wet winding, hot pressing tank or metal mold matching one-time forming (forming with skin) or multi-time forming (first curing the reinforcing rib and then laying the skin for curing) curing.

[0004] The wet winding cabin can only produce the cabin without flange due to the characteristics of the wet winding process, but more and more products need to be connected or supported by flange face. Therefore, it is very important to invent a wet winding forming cabin technology with flange. SUMMARY

[0005] Therefore, in order to solve the technical problems mentioned in the background art, the present application provides a wet winding flip flange composite material cabin forming process and its forming device.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme: a wet winding flip flange composite material cabin forming process, which specifically comprises the following steps:

[0007] (1) installing the upper and lower positioning discs on the male mold body by bolts;

[0008] (2) installing the upper and lower male mold flanges on the upper and lower positioning discs by bolts respectively;

[0009] (3) installing the upper and lower male mold heads on the upper and lower positioning discs by bolts respectively;

[0010] (4) passing the shaft through the male mold body and fixing it with the upper and lower positioning discs;

[0011] (5) installing the upper and lower male mold head nuts on the shaft and tightening the upper and lower male mold head nuts;

[0012] (6) smearing release agent on the outer surface of the assembled mold;

[0013] (7) installing the assembled mold on the winding machine;

[0014] (8) winding the skin according to the set program and the layer, the skin is 3mm thick, the single layer skin is 1mm, and there are 3 layers;

[0015] (9) after winding, the isolated film is used to wrap and fix the wrapped skin;

[0016] (10) at the position of half of the male head, the isolated film and the skin are cut in a ring shape, and the skin at both ends is not needed;

[0017] (11) the remaining skin at the male head is slowly unfolded and turned over to the male body in a reverse direction;

[0018] (12) the male head is removed, and the male flange is separated from the male body by a certain distance;

[0019] (13) the skin at the male head is unfolded into the gap between the male flange and the male body and is flattened, the bolt between the male flange and the male body is tightened, the skin between the male flange and the male body is compressed, the excess skin is cut off, the isolated film is removed, and the product is rotated and solidified.

[0020] A forming device for a wet winding and flange turning composite material cabin forming process, comprising a shaft, a male mold, a lower positioning disc and an upper positioning disc, the male mold is fixed on the shaft through the lower positioning disc and the upper positioning disc,

[0021] the male mold comprises a male mold body, upper and lower male mold flanges and upper and lower male mold heads, the upper and lower male mold flanges are respectively fixed on both sides of the male mold body, and the upper and lower male mold heads are also respectively fixed on both sides of the male mold body.

[0022] Further, the straight mouth height of the upper and lower positioning discs is 30mm.

[0023] Further, the upper and lower male mold flanges can translate on the corresponding upper and lower positioning discs.

[0024] Compared with the prior art, the wet winding and flange turning composite material cabin forming process and the forming device have the following beneficial effects:

[0025] The forming process is simple in operation, the winding machine is used for winding forming process, the process is stable, the deficiency that the composite material cabin section cannot be integrally formed with the flange in the wet winding is solved, and the application range of the wet winding composite material cabin section is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 it is a structure schematic view of the wet winding and flange turning composite material cabin forming device of the present application;

[0028] In the figure: 1-axis, 2-lower male die head nut, 3-lower male die head, 4-lower male die flange, 5-lower positioning disc, 6-male die body, 7-upper positioning disc, 8-upper male die flange, 9-upper male die head, 10-upper male die flange nut. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0030] I. Specific implementation mode one, see Figure 1 It is explained that the embodiment is a wet winding and flanging composite material cabin forming process, which specifically includes the following steps:

[0031] (1) Bolt the upper and lower positioning discs on the male die body 6;

[0032] (2) Bolt the upper and lower male die flanges on the upper and lower positioning discs respectively;

[0033] (3) Bolt the upper and lower male die heads on the upper and lower positioning discs respectively;

[0034] (4) Pass the shaft 1 through the male die body 6 and fix it with the upper and lower positioning discs;

[0035] (5) Install the upper and lower male die head nuts on the shaft 1 and tighten the upper and lower male die head nuts;

[0036] (6) Apply release agent to the outer surface of the assembled mold;

[0037] (7) Install the assembled mold on the winding machine;

[0038] (8) According to the set program, wind the skin according to the layer, the skin is 3mm thick, the single layer skin is 1mm, and there are 3 layers in total;

[0039] (9) After winding, wrap and fix the wound skin with the release film;

[0040] (10) At the position of half of the male die head, cut the release film and the skin in a ring shape, and do not use the skin at both ends;

[0041] (11) Slowly unfold the remaining skin at the male die head and reverse it onto the male die body 6;

[0042] (12) Remove the male die head and separate the male die flange from the male die body 6 by a certain distance;

[0043] (13) The skin at the male die head is expanded into the gap between the male die flange and the male die body 6 and flattened; the bolts between the male die flange and the male die body 6 are tightened; the skin between the male die flange and the male die body 6 is compressed, the excess skin is cut off, the release film is removed, and the product is rotated and cured.

[0044] The male die comprises a male die body 6, upper and lower male die flanges, and upper and lower male die heads, the upper and lower male die flanges are respectively fixed on both sides of the male die body 6, and the upper and lower male die heads are also respectively fixed on both sides of the male die body 6.

[0045] The straight mouth height of the upper and lower positioning discs is 30 mm.

[0046] The upper and lower male die flanges can be translated on the corresponding upper and lower positioning discs.

[0047] The above disclosed embodiments of the present application are only used to help explain the present application. The embodiments do not describe all the details, nor limit the present application to the specific embodiments. According to the content of the present application, many modifications and changes can be made. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can well understand and utilize the present application.

Claims

1. A composite material cabin molding process for wet-wound spiral flanges, characterized in that: Specifically, the following steps are included: (1) Install the upper and lower positioning plates onto the male mold body (6) with bolts; (2) Install the upper and lower male mold flanges onto the upper and lower positioning plates respectively using bolts; (3) Install the upper and lower male mold heads onto the upper and lower positioning plates respectively using bolts; (4) Pass the shaft (1) through the male mold body (6) and fix it with the upper and lower positioning plates; (5) Install the upper and lower male mold end cap nuts on the shaft (1) and tighten the upper and lower male mold end cap nuts; (6) Apply release agent to the outer surface of the assembled mold; (7) Install the assembled mold onto the winding machine; (8) Wrap the skin according to the set program, with the skin thickness being 3mm, each layer being 1mm, for a total of 3 layers; (9) After the wrapping is completed, wrap and fix the wrapped skin with release film; (10) At half the position of the male mold head, cut the release film and skin circumferentially, discarding the skin at both ends; (11) Slowly unfold the remaining skin at the male mold head and flip it back onto the male mold body (6); (12) Remove the male mold head and separate the male mold flange from the male mold body (6) by a certain distance; (13) Unfold the skin at the end of the male mold into the gap between the male mold flange and the male mold body (6) and flatten it; tighten the bolts between the male mold flange and the male mold body (6); press the skin between the male mold flange and the male mold body (6), cut off the excess skin, remove the isolation film, and rotate the product to cure. The forming device used in the wet-winding flange composite material cabin forming process includes a shaft (1), a male mold, a lower positioning plate (5), and an upper positioning plate (7). The male mold is fixed on the shaft (1) by the lower positioning plate (5) and the upper positioning plate (7). The male mold includes a male mold body (6), upper and lower male mold flanges and upper and lower male mold heads. The upper and lower male mold flanges are fixed on both sides of the male mold body (6), and the upper and lower male mold heads are also fixed on both sides of the male mold body (6).

2. The composite material cabin molding process for wet-wound spiral flanges according to claim 1, characterized in that: The straight opening height of the upper and lower positioning plates is 30mm.

3. The composite material cabin molding process for wet-wound spiral flanges according to claim 1, characterized in that: The upper and lower male flanges can be moved horizontally on the corresponding upper and lower positioning plates.

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