JPH0694177B2 - Method for manufacturing multiple cylindrical members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a first tubular portion having a relatively small cross section perpendicular to the axis and a second tubular portion having a relatively large diameter, and these first tubular portions. The present invention also relates to a method for manufacturing a multiple tubular member having at least a second annular portion connected to each other and held coaxially.

[Outline of Invention]

The present invention, in the method for manufacturing a multiple tubular member as described above, uses a fiber, a woven material and a resin as constituent materials, and by manufacturing the multiple tubular member by winding the fibers, it is lightweight and high It is possible to manufacture the multi-layered cylindrical member with a high yield and a small number of man-hours, and it is easy to change the material composition and automate the manufacturing.

[Conventional technology]

Multiple tubular members are often used in tubular structures such as aircraft window frames and fuselage.

FIG. 7 and FIG. 8 show first and second conventional examples of a double cylindrical member which is a kind of such a multiple cylindrical member. The first conventional example shown in FIG. 7 is a rivet 13 in which the webs of a pair of sheet metal molded products 11 and 12 formed in a groove shape are brought into contact with each other.
In the second conventional example shown in FIG. 8, the grooves 15 and 16 are machined on both sides of the square tubular metal member 14.

Also, as a third conventional example, there is a woven material made of FRP, a unidirectional reinforcing material, or the like laid up in the shape shown in FIGS. 7 and 8 (not shown).

[Problems to be solved by the invention]

However, the above-mentioned first and second conventional examples are both heavy because they are made of metal, and are not suitable for aircraft parts or the like.

The third conventional example described above is lightweight because it is made of FRP, but its strength is not sufficiently high because it is manufactured only by layup. In addition, since woven materials, unidirectional reinforcing materials, etc. are once manufactured and then laid up, the yield is low, and the material composition cannot be easily changed.
Moreover, the number of processing steps is large, and automation of manufacturing is not easy.

[Means for solving problems]

The method for manufacturing a multi-layered tubular member according to the present invention comprises a first textile material.
A step of winding 21 on a mandrel 22, and winding a first fiber 24 impregnated with resin around at least a part of the outer peripheral surface of the first woven material 21 in a wound state to form a first tube. Step of forming a portion to be the shaped portion 41, and first and second ring-shaped molds
The webs 27a, 27b and 28a, 28b sandwich a plurality of second annular belt-shaped woven materials 31a, 31b and hold these first and second dies 27
a, 27b and 28a, 28b and second woven material 31a, 31b are arranged on the outer periphery of the mandrel 22 coaxially with the mandrel 22, and the first and second molds 27a, 27b and 28a, 28b.
The outer peripheral surface and the inner peripheral surface facing the first fiber 24 in the wound state are covered with at least a part of the plurality of second fabric materials 31a and 31b, and the second fabric material A step of forming a portion to be the ring band portion 43 by a portion of 31a and 31b held by the web, and the second woven material 31
The first and second molds 27 covered by a and 31b
The outer peripheral surface of a, 27b and 28a, 28b and the second woven material 31
a and 31b of the first and second molds 27a, 27b and 28
a step of winding the second fiber 34 impregnated with the resin on at least a part of the outer peripheral surface of the part held by a and 28b to form a part to be the second tubular part 42; ,
The step of curing the resin, the mandrel 22 and the first and second textile materials 21, 31a, 31b and the first and second fibers 24, 34 solidified by the cured resin And the step of releasing from the first and second molds 27a, 27b and 28a, 28b, respectively.

[Action]

In the method for manufacturing a multiple tubular member according to the present invention, the fibers 24, 34
Further, since the woven materials 21, 31a, 31b and the resin are used as the constituent materials, carbon fibers or the like can be used as the material of the fibers 24, 34 and the woven materials 21, 31a, 31b.

Further, since the multiple tubular member is manufactured by winding the fibers 24 and 34, the multiple tubular member can be manufactured by the filament winding method using continuous fibers.

〔Example〕

Hereinafter, the first to the present invention applied to the production of the double cylindrical member
A fifth embodiment will be described with reference to FIGS.

1 and 2 show the steps of the first embodiment.
In this first embodiment, as shown in FIGS. 1A and 2A, a strip-shaped woven material 21 in which carbon fibers are woven in a direction of ± 45 ° is first prepared, and this woven material 21 is wound around a mandrel 22. To do.

On one end face of the mandrel 22, the mandrel 22
A side plate 23 having a larger diameter than that is integrally provided.

Next, as shown in FIGS. 1B and 2B, carbon fibers 24 impregnated with a thermosetting resin or a thermoplastic resin are wound around the entire outer peripheral surface of the fabric material 21 by parallel winding. This winding is performed with the side plate 25 having the same outer diameter as the side plate 23 fixed to the other end surface of the mandrel 22 with screws 26a and 26b.

Next, as shown in FIGS. 1C and 2C, a plurality of pairs of semi-annular strip-shaped woven materials 31a, 31b are sandwiched by respective webs of a pair of semi-annular strips 27a, 27b and 28a, 28b. The molds 27a, 27b, 28a, 28b and the textile materials 31a, 31b in a
It is placed coaxially on 22.

The annulus formed by the pair of molds 27a, 27b has an inner diameter larger than the outer diameter of the mandrel 22 and an outer diameter smaller than the outer diameter of the side plate 23, and these molds 27a, 27b are Screw
It is fixed to the side plate 23 by 32a and 32b.

The annulus formed by the other pair of molds 28a, 28b is the mold 27
a, 27b having an inner diameter equal to the inner diameter of the annulus and an outer diameter equal to the outer diameter of the side plate 25, these molds 28a, 28b,
It is fixed to the side plate 25 with screws 33a and 33b.

Of the plurality of pairs of textile materials 31a, 31b forming the annulus, the mold 27
Textile materials to be placed near the webs of a, 27b and 28a, 28b
As 31a, 31b, those having an inner diameter smaller than the inner diameter of the mold 27a, 27b, 28a, 28b and an outer diameter larger than the outer diameter of the mold 27a, 27b, 28a, 28b are used, and other than that Textile material 31
As a and 31b, those having an inner diameter and an outer diameter substantially equal to those of the molds 27a and 27b are used.

Then, as is clear from FIG. 2C, the molds 27a, 27b and 28a, 2
By bending the inner peripheral portion and the outer peripheral portion of the woven material 31a arranged in the vicinity of the respective webs with 8b, the molds 27a, 27b and 28 are formed.
The inner and outer peripheral surfaces of a and 28b are covered.

The woven materials 31a and 31b are made of carbon fibers similarly to the woven material 21, but the strength in the radial direction of the mandrel 22 is, if necessary, a predetermined amount of carbon fibers themselves extending in the radial direction of the mandrel 22. In addition to the textile materials 31a, 31b, the molds 27a, 27b and 28
It may be placed between a and 28b.

Next, as shown in FIGS. 1D and 2D, the outer peripheral surface of the mold 27a covered with the fabric materials 31a and 31b and the fabric materials 31a and 31b.
The carbon fiber 34 impregnated with a thermosetting resin, a thermoplastic resin, or the like is wound by parallel winding on the entire outer peripheral surface of the part held between the molds 27a, 27b and 28a, 28b.

Next, as shown in FIGS. 1E and 2E, by folding back the portion of the woven material 31a, 31b that covers the outer peripheral surface of the molds 28a, 28b, it is wound around the outer peripheral surface of the molds 27a, 27b. The turned carbon fiber 34 is coated.

By doing so, the excess amount of the resin impregnated in the carbon fibers 24, 34 is absorbed by the woven materials 21, 31a, 31b, so that the mandrel 22 and the molds 27a, 27b, 28a, 28b are removed. The resin is prevented from adhering, and the textile materials 21, 31a, 31b are also impregnated with the resin.

After that, bagging, resin curing, mold release, and finishing are performed, and as is apparent from FIG. 2E, a double cylindrical shape having first and second cylindrical parts 41 and 42 and a ring-shaped part 43. The part is manufactured.

3 to 6 show one step in the second to fifth embodiments, respectively. As is clear from FIGS. 3 to 6, the bending directions of the woven materials 21, 31a, 31b and the carbon fiber 2
Second, except that the winding parts of 4, 34 are different from each other
The fifth embodiment has substantially the same steps as the first embodiment described above.

However, in the second and fifth embodiments shown in FIGS. 3 and 6, the woven material 35 is further wound around the outer peripheral surface of the wound carbon fiber 34. And according to these 2nd-5th Example,
It is possible to manufacture a double cylindrical member having various sectional shapes different from those of the above-described first embodiment.

In each of the above-mentioned first to fifth embodiments, a double-cylindrical member having a true cylindrical shape is manufactured, but an elliptic cylindrical shape or a rectangular cylindrical shape like the above-mentioned first and second conventional examples is used. It is also possible to manufacture a heavy tubular member.

Further, although the present invention is applied to the production of the double tubular member in any of the above first to fifth embodiments, the present invention is also applied to the production of a triple or more tubular member having higher rigidity. Can be applied.

〔The invention's effect〕

In the method for manufacturing a multiple tubular member according to the present invention, since carbon fiber or the like can be used as a constituent material, a lightweight multiple tubular member can be produced.

Further, since continuous fibers can be used by the filament winding method, it is possible to manufacture a multi-tubular member having higher strength as compared with a method in which only a woven material or a unidirectional reinforcing material is laid up.

In addition, since the multiple tubular member can be manufactured by the filament winding method using fibers, the yield can be improved as compared with the method of manufacturing the woven material or the unidirectional reinforcing material and then laying them up. The manufacturing cost is high, the material composition can be easily changed, the number of processing steps is small, and the automation of manufacturing is easy.

[Brief description of drawings]

1 to 6 show first to fifth embodiments of the present invention, and FIGS. 1A to 1E are perspective views sequentially showing the manufacturing process of the first embodiment, and FIGS. 2A to 2E. Figures 2E are respectively Figure 1A to 1E II-
An enlarged cross-sectional view taken along the line II, FIGS.
FIG. 11 is a cross-sectional view showing one manufacturing process in the fifth embodiment and corresponding to FIG. 2E. FIGS. 7A and 8A are front views showing double cylindrical members manufactured by the first and second conventional examples, respectively, and FIGS. 7B and 8B are BB lines of FIGS. 7A and 8A, respectively. It is an expanded sectional view in. In the reference numerals used in the drawings, 21 ... fabric material 22 ... mandrel 24 ... carbon fiber 27a, 27b, 28a, 28b ... mold 31a, 31b ... fabric material 34 ... carbon fiber 41,42 .... Cylindrical part 43 ... It is a ring part.

Claims (8)

[Claims] 1. A first tubular portion having a relatively small cross section perpendicular to the axis and a second tubular portion having a relatively large cross section, and these first and second tubular portions are connected to each other and coaxial. A method for manufacturing a multi-layered tubular member having at least a ring-shaped portion that is held in a circular shape, and a step of winding the first woven material around a mandrel, and A first fiber impregnated with a resin is wound around at least a part of the first fiber to form the first fiber.
Forming a portion to be a tubular portion of the first and second molds, and holding a plurality of second and second ring-shaped fabric materials with the first and second webs of the first and second ring bands. A second woven material is arranged on the outer periphery of the mandrel coaxially with the mandrel, and an inner peripheral surface of the first and second dies facing the outer peripheral surface and the first fiber in a wound state. And at least a part of the plurality of second woven materials to form a portion of the second woven material that is to be the annular zone by a portion held by the web. , The outer periphery of the first and second molds covered with the second fabric material and the outer periphery of a portion of the second fabric material held between the first and second molds, The second fiber impregnated with the resin is wound around at least a part of the surface, Forming a portion to become the second tubular portion, and curing the resin, the cured first said solidified by resin, and the second
And a step of separating the first and second fibers from the mandrel and the first and second molds, respectively. 2. The first woven material is wound around the entire outer peripheral surface of the first woven material, and the woven material separate from the first woven material is the second woven material. The method for producing a multiple tubular member according to claim 1, which is used as 3. An outer peripheral surface of one of the outer peripheral surfaces of the first and second molds covered with the second woven material and the first and second outer peripheral surfaces of the second woven material. The method for producing a multiple tubular member according to claim 2, wherein the second fiber is wound only on the outer peripheral surface of the portion held by the mold of No. 2. 4. The outer peripheral surface of the first and second molds covered with the second woven material and the second woven material sandwiched between the first and second dies. The method for manufacturing a multiple tubular member according to claim 2, wherein the second fiber is wound around the entire outer peripheral surface of the existing portion. 5. The first fiber is wound only on a part of an outer peripheral surface of the first woven material in a wound state, and the first fiber is not wound in the first woven material. The method for manufacturing a multiple tubular member according to claim 1, wherein the portion is used as a part of the plurality of second woven materials. 6. The outer periphery of the mold facing the first fiber in a wound state among the outer peripheral surfaces of the first and second molds covered with the second woven material. 6. The method according to claim 5, wherein the second fiber is wound only on a surface and the outer peripheral surface of a portion of the second woven material held by the first and second molds. 2. A method for manufacturing a multiple tubular member. 7. The mold of the mold which is not opposed to the wound first fiber of the outer peripheral surfaces of the first and second molds covered with the second fabric material. The second portion is formed only on the outer peripheral surface and the outer peripheral surface of the portion of the second woven material held by the first and second molds.
The method for producing a multiple tubular member according to claim 5, wherein the fiber is wound. 8. An outer peripheral surface of the first and second molds covered with the second woven material and a portion of the second woven material held between the first and second dies. The method for manufacturing a multiple tubular member according to claim 5, wherein the second fiber is wound around the entire outer peripheral surface of the existing portion.