JPH0550511A - Manufacture of metal-clad reinforced resin cylindrical member - Google Patents

Abstract

PURPOSE:To contrive to mass-produce and obtain a low cost product having uniformity by a method wherein an inner tubular body and a metal tubular body is made into an integral body by fitting the metal tubular body onto a fiber reinforced resin tubular body and then hardening resin-impregnated reinforcing fiber while the diameter of the inner tubular body is enlarged by pressurizing the inside of the inner tubular body. CONSTITUTION:Resin-impregnated reinforcing fiber 2 is wound round an inner tubular body 1, the diameter of which is variable and which is made of glass fiber, for example, so as to prevent the diameter of the inner tubular body 1 from enlarging. The winding is spiral one with the helix angle of + or -10-45 deg. to the axial direction of the inner tubular body 1. After that, thin aluminum tubular body 4 is fitted onto the resultant fiber reinforced resin tubular body. Next, the resin-impregnated reinforcing fiber 2 is hardened under the condition that the diameter of the inner tubular body 1 is enlarged by pressurizing the inside of the inner tubular body 1 with proper means such as the feeding of compressed air so as to make the inner tubular body 1 and the metal tubular body 4 into an integral body in order to manufacture the metal-clad inner tubular body concerned. Thus, working process is reduced and consequently cost can be contrived to be lowered.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a metal-coated fiber-reinforced resin cylindrical member.

[0002]

2. Description of the Related Art As a conventional manufacturing method of a metal-coated fiber-reinforced resin cylindrical member, first of all, as a simplest method, a metal cylindrical body is bonded to an FRP cylindrical body with an adhesive. It is a method of fitting.

However, this method has the following drawbacks.

In this method, the surface of the FRP cylinder is cut to determine the outer diameter of the FRP cylinder. By the way, FRP uses continuous fibers in order to obtain strength. Therefore, cutting the surface of the FRP cylinder in this method means cutting the continuous fibers of the FRP, which inevitably leads to a decrease in strength and rigidity of the FRP cylinder. ..

Further, the surface cutting step of the FRP cylinder naturally causes a problem of cost increase.

Also, the adhesive has a small absolute strength,
There is also a problem that the adhesive has a nonuniform strength value due to humidity or the like, a fitting failure between the metal tubular body and the FRP tubular body, and the like.

Further, since this method assumes a short product, there is also a problem that workability is inevitably deteriorated when a long product is used.

As another method for manufacturing a metal-coated fiber-reinforced resin cylindrical member, there is a so-called clad method in which a metal cylinder is pressed into an FRP cylinder.

However, this method also has the following drawbacks.

Similar to the above method, there is a problem that the strength of the FRP cylinder is lowered and the cost is increased due to the surface cutting step of the FRP cylinder.

[0011] Furthermore, as the metal cylindrical body, it is necessary to select a highly accurate cylindrical body having a small inner diameter tolerance, so that the cost is inevitably high, and when the metal cylindrical body is press-fitted and fitted, the metal cylindrical body is pressed. It is necessary to select a thick-walled cylinder so that buckling does not occur. Therefore, there is a problem that the manufacturing efficiency is poor due to the restriction of the selection of the metal cylinder. In addition, the fact that the metal cylinder must be made to be thick to some extent also impedes the weight reduction of the product.

Another method for producing a metal-coated fiber-reinforced resin cylindrical member is to form a plating layer on the surface of an FRP cylindrical body.

However, this method also has the following drawbacks.

Since the surface cutting of the FRP cylinder is an essential work as in the above method, there is a problem that the strength of the FRP cylinder is lowered and the cost is increased.

There are many indispensable steps in the plating process such as the formation of the conductive layer, so that the workability is deteriorated and the cost is increased.

Due to the existence of the plating process, the FRP cylinder has to be formed of a material that can be subjected to the plating process, which causes a problem of material limitation.

It is a technical object of the present invention to provide a method for producing a metal-coated fiber-reinforced resin cylindrical member that solves the drawbacks of the above methods.

[0018]

The gist of the present invention will be described with reference to the accompanying drawings.

The resin-impregnated reinforcing fiber 2 is wound around the inner cylinder 1 whose diameter is variable, in a state where the expansion of the diameter of the inner cylinder 1 is not hindered,
The metal cylinder 4 is fitted on the fiber-reinforced resin cylinder to form the inner cylinder 1
The inside of the inner cylindrical body 1 is cured by applying pressure to the inner side of the inner cylindrical body 1 while expanding the diameter of the inner cylindrical body 1 to cure the resin-impregnated reinforcing fiber 2.
The present invention relates to a method for manufacturing a metal-coated fiber-reinforced resin cylindrical member, characterized in that the metal-coated cylindrical member is formed by integrating the metal cylinder body 4 and the metal cylindrical body 4.

[0020]

[Operations and Examples] As shown in FIG. 1, a glass cloth prepreg sheet having a predetermined width is wound, and one end edge and the other end edge are not abutted with each other and one is positioned inside the other to cure. Then, the inner cylindrical body 1 is formed.

Alternatively, as shown in FIG. 2, the inner cylindrical body 1 may have a structure in which both ends of the glass cloth prepreg sheet are abutted against each other and another member 1'is attached to one end.

Although the inner cylinder 1 is made of glass fiber, it may be made of any material such as carbon fiber, aramid fiber, Kevlar fiber, or may be made of a thin metal plate material.

Further, the diameter of the inner cylinder body 1 in the drawing is enlarged due to its forming structure, but the forming material itself may expand and contract, and as a result, the diameter of the inner cylinder body 1 may be changed. Can be any inner cylinder 1 as long as it has a variable diameter.

Subsequently, the inner cylinder 1 is fitted onto the rotary rod 5 shown in FIGS. 3, 4 and 5, and the inner cylinder 1 is locked to the left and right locking projections 9.
To support.

This rotating rod body 5 has a symmetrical structure.
This will be described below.

The rotating rod body 5 is provided at both ends of the base rod 17 having a predetermined length.
The tubular member 18 provided with the ventilation passage 7 is screwed into the base rod 17 and the communication passage 8 is formed.
Is provided, one end of the communication passage 8 is exposed to the ventilation passage 7, and the other end is opened to the outer peripheral surface of the base rod 17 to provide the ventilation port 3, and a locking projection is provided on the end of the tubular member 18 on the base rod 17 side. 9, and a chuck grip 10 is formed at the other end of the tubular member 18. A rubber tube 11 is fitted on the base rod 17, and an end portion of the rubber tube 11 is fixed by a fixing band 6.
Further, a groove 12 into which the resin-impregnated reinforcing fiber 2 is dropped is provided on the outer side of the locking projection 9. The outside of the groove 12 is shown in FIG.
A winding jig 14 on which a locking pin 13 for locking the resin-impregnated reinforcing fiber 2 as shown in FIG.

The inner cylindrical body 1 whose surface is coated with a release agent is fitted onto the rotating rod 5 having such a structure, and is rotated with the chuck gripping portions 10 at both ends gripped by the chucks. A resin-impregnated reinforcing fiber 2 impregnated with a thermosetting resin such as the above is wound around the rotating inner cylinder 1. It is a filament winding method.

For the winding of the resin-impregnated reinforcing fiber 2, a hoop winding in which the resin-impregnated reinforcing fiber 2 is wound in a state orthogonal to the axial direction of the inner cylinder 1 cannot be adopted, and the angle θ with respect to the axial direction is ± 10 °. ~ 45
It is wound with a helical winding (spiral winding) of 10 ° (see Fig. 9).
This is because, as will be described later, when the diameter of the inner cylinder 1 is about to be expanded, the expansion is hindered by the hoop winding.

In this way, the resin-impregnated reinforcing fiber 2 is wound around the inner cylindrical body 1 to form the fiber-reinforced resin layer 15, and then, as shown in FIG.
As shown in FIG. 4, the binding yarns 19 are wound around the fiber-reinforced resin layer 15 at the positions of the left and right grooves 12, respectively, and the fiber-reinforced resin layer 15 is dropped into the grooves 12. Layer 15
Is cut and the winding jig 14 is removed. Due to the presence of the binding yarn 19, even if the fiber reinforced resin layer 15 is cut, the fiber reinforced resin layer
The resin-impregnated reinforcing fiber 2 of 15 does not meander, loosen, or fall off from the rotating rod body 5, and the presence of the groove 12 causes the fiber-reinforced resin layer 15 to fall into the groove 12.
There is no problem in fitting the metal cylinder body 4 described later.

Subsequently, a thin aluminum pipe made of aluminum is fitted on the fiber reinforced resin layer 15 as the metal cylinder 4.

Subsequently, compressed air is supplied to the ventilation passage 7.
Compressed air is introduced into the rubber tube 11 from the communication passage 8,
The rubber tube 11 expands, the inside of the inner cylinder 1 is pressurized by the rubber tube 11, and the diameter of the inner cylinder 1 increases, so that
The fiber reinforced resin layer 15 is pressed onto the inner surface of the aluminum pipe. In this state, the rotating rod body 5 is rotated and a predetermined temperature is applied to heat the fiber reinforced resin layer 15 to cure the fiber reinforced resin layer 15, and the fiber reinforced resin layer 15 and the aluminum pipe are integrated into a metal fiber reinforced resin coated cylinder. A member is formed.

During the curing process, the binding yarn 19
Remove. Although the fiber-reinforced resin layer 15 and the aluminum pipe are integrated together from the end side in the central part first,
If the central portions of both are integrated, the resin-impregnated reinforcing fiber 2 will not fall off even if the binding yarn 19 is removed. As the integration of the two moves to both ends, the binding yarn 19 will hinder the integration of the both, so it is desirable to remove the binding yarn 19 when the vicinity of the central portion of both is integrated. .

6 and 7 are cross-sectional views of the compressed air before and after air feeding, and reference numeral 30 is a gap.

Subsequently, air supply is stopped, the metal-coated fiber-reinforced resin cylindrical member is pulled out from the rotary rod body 5, and the inner cylinder 1 is removed from the cylindrical member. The surface of the member is ground, then the ground surface is hard chrome plated, and finally the surface of the hard chrome plated layer 16 is finished to give a product as shown in FIG.

Since the metal-coated fiber-reinforced resin cylindrical member according to the embodiment is manufactured by the above-mentioned steps, the number of processing steps is reduced as compared with the conventional example, so that a product with lower cost can be manufactured. ..

FIG. 10 shows a case where a rotating rod body 5 having a structure different from that of the above-described rotating rod body 5 is adopted, and is a drawing corresponding to FIG. Rubber tube with metal support cylinder 20
Since 11 is supported, the minimum diameter of the inner tubular body 1 is restricted by the inner supporting tubular body 20. Therefore, the inner tubular body 1 is not bent inward, and the workability of winding the resin-impregnated reinforcing fiber 2 is improved. improves. Reference numeral 21 is a ventilation hole.

11 and 12 are explanatory views of a method of manufacturing a metal-coated fiber-reinforced resin cylindrical member based on the same concept as in the above-mentioned embodiment, and FIG.
2 is the time of curing after the compressed air is fed. Reference numeral 22 is a rotating rod, 23 is a fastening band, 24 is a rubber tube, 25 is a contraction FRP for protecting the rubber tube, 26 is a cushion material for protecting the rubber tube, 27 is a fiber reinforced resin layer, and 28 is an aluminum cylinder. Body, 29
Is a ventilation hole, and 31 is a winding jig.

[0038]

As described above, the present invention makes it possible to produce a metal-coated fiber-reinforced resin cylindrical member which is extremely excellent in mass productivity and which is low in cost.

[Brief description of drawings]

FIG. 1 is a sectional view of an inner cylinder according to the present invention.

FIG. 2 is a cross-sectional view of another example of the inner cylinder body according to the present invention.

FIG. 3 is an explanatory sectional view of the present invention.

FIG. 4 is an explanatory sectional view of the present invention.

FIG. 5 is an explanatory sectional view of the present invention.

FIG. 6 is an explanatory sectional view of a main part of the present invention.

FIG. 7 is an explanatory cross-sectional view of a main part of the present invention.

FIG. 8 is a cross-sectional view of a product manufactured according to the present invention.

FIG. 9 is an explanatory diagram of the present invention.

FIG. 10 is an explanatory cross-sectional view of another example of the present invention.

FIG. 11 is an explanatory cross-sectional view of another example of the present invention.

FIG. 12 is an explanatory cross-sectional view of another example of the present invention.

[Explanation of Codes] 1 inner cylinder 2 resin-impregnated reinforcing fiber 4 metal cylinder

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Claims (1)

[Claims] 1. A resin-impregnated reinforcing fiber is wound around an inner cylinder whose diameter is variable without hindering expansion of the diameter of the inner cylinder, and a metal cylinder is fitted on the fiber-reinforced resin cylinder to Forming a metal-coated cylindrical member by pressing the inside of the tubular body with an appropriate means to cure the resin-impregnated reinforcing fiber while expanding the diameter of the inner tubular body and integrating the inner tubular body and the metal tubular body. A method for producing a metal-coated fiber-reinforced resin cylindrical member, comprising: