JPH01114421A - Manufacture of dissimilar material joint - Google Patents

Abstract

PURPOSE:To manufacture a dissimilar material joint remarkably improved in tensile strength, by a method wherein a specific intermediate material intervenes in a jointing part of a joint composed of different materials. CONSTITUTION:The end part of a joint 10, 11 mad of CFRP material is scooped and an intermediate member 12 is inserted into the part. A hole is made in the intermediate member 12 and processed so that an joint insert 13 made of aluminum can be inserted into it. On the other hand, intermediate members 16, 17 of the same material as that of said intermediate member 12 is fixed in the aluminum joint insert 13 and adheres. Next, the aluminum joint insert 13, to which the intermediate members 16, 17 have adhered, is inserted into the hole section of the intermediate member 12 of the joint 10, 11 made of CFRP material. As the part of adhesion between the CFRP joint and the aluminum joint is composed of the intermediate members 12, 16, 17 of the same material, the adhesion action is remarkably improved. Besides, as the aluminum joint part is thickly reinforced with the intermediate member 16, 17, it is also excellent in tensile strength.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a dissimilar material joint that is applied to, for example, the outer shell of an underwater vehicle or deep-sea exploration vessel, or a structure such as a space rocket.

[Conventional technology]

Generally, an underwater vehicle is composed of components 1 to 6 as shown in Fig. 3, and each of the above components 1 to 6 is usually multi-jointed with mechanical joints so that they can be easily attached and detached. It has become.

Part A of the above mechanical joint is component 2.
As shown in FIG. 4, which shows details of the joining portion between the component 3 and the component 3, the joining surfaces 7 are joined through the V-clamp 8.

The outer shell of each component 1 to 6 above is usually made of aluminum alloy, but a CFRP sandwich structure may also be used; in the latter case, the mechanical joint has a complex shape, is difficult to process, and lacks strength. Because metal materials are used for this reason, a dissimilar material joint is required to join the CFRP sandwich structure and the metal material.

A conventional dissimilar material joint is shown in section B of Fig. 2.

The conventional dissimilar material joint shown in part B of Fig. 2 is component 2.
The outer shell is a CFRP sand inch structure, and the inner and outer cylinders 10 and 10 are made of a core material 9 and laminated materials sandwiching the core material 9. An aluminum alloy insert 13 forming a part of the mechanical joint fitting 14 is bonded to the above-mentioned outer shell (IIK) via an intermediate member 12 made of FRP.

[Problem that the invention seeks to solve]

When a tensile force is applied to a conventional dissimilar material joint, the intermediate material 12 and the aluminum alloy insert 13 have weak adhesive strength because they have different button properties, and there is a risk that the aluminum alloy insert 13 may come off from the intermediate material 12.

In order to solve the above problems, a dissimilar material joint in which the tip of the aluminum alloy insert 13 is thickened as shown in FIG. 5 has been considered, but there has been no suitable method for manufacturing the above dissimilar material joint.

The present invention aims to provide a method for manufacturing a dissimilar material joint that solves the above-mentioned problems.

[Means for solving problems]

In the present invention, the core material at the end of a cylindrical body made of CFRP material is scooped out to create a recessed part, and then the thin part of the insert part made by thickening the tip of the cylindrical body made of a metal material is filled in. An intermediate material processed to have the same shape as the recess of the cylindrical body made of CFRP material and divided into two parts for inner and outer surfaces is attached and glued to the inner and outer surfaces of the insert part, and then the cylinder made of CFRP material is attached. An insert portion to which a cylindrical intermediate material made of the above-mentioned metal material was adhered was inserted into the recess of the body and adhered.

[Effect]

In the above, the adhesion between intermediate material and intermediate material or between intermediate material and core material or CFRP material is better than that between intermediate material and metal material, and because the tip of the insert is formed thick, It's better than CFRP material.
The tensile strength of the joint between the cylindrical body made of cFRP material and the cylindrical body made of metal material is significantly improved.

By the above manufacturing method! As a result, it has become possible to manufacture a dissimilar material joint with a cylindrical body made of CFRP material and a cylindrical body made of metal material, which has significantly improved tensile strength compared to the conventional cylindrical body.

〔Example〕

The first step of manufacturing an embodiment of the present invention is shown in FIG. 1(a).
The second stage is shown in Figure 1 Φ) K1 The third stage is shown in Figure 1 (c) I
c Show.

In the first stage of this embodiment shown in FIG. 1(a), the core material 9
and an inner and outer cylinder 10 made of laminated materials sandwiching the same core material 9.
．． The 9th end of the core material of the CFRP sandwich structure composed of 11 is scooped out, this partially busy intermediate material 12 is inserted, and a hole into which the aluminum alloy insert 13 is inserted is bored in the intermediate material 12. .

In the second stage of this embodiment shown in Fig. 1 (03) below, two inner and outer materials made of the same material as the intermediate material 12 are used to fill the thin part of the aluminum alloy insert 13 with a thick tip. The divided cylinders 16 and 17 are fitted into the recessed portions of the aluminum alloy insert 13 described above and bonded.

In the third stage of this embodiment shown in FIG. 1(c)K, the first
Intermediate material 12 of CFRP sand inch structure shown in Figure (a)
The aluminum alloy insert 13 with the cylinders 16 and 17 shown in FIG. 1 Φ) bonded thereto is inserted into the hole and bonded. In the above, since the bonding parts between the intermediate material 12 and the cylinders 16 and 17 are made of the same material, the adhesive strength is significantly improved compared to the case where the intermediate material 12 and the aluminum alloy insert 13 are bonded. Since the tip of the insert 13 is thick, the strength is greatly improved when a tensile force is applied between the aluminum alloy insert 13 and the CFRP sandwich structure.

By the above manufacturing method, it has become possible to manufacture a dissimilar material joint with a cylindrical body made of a CFRP material and a cylindrical body made of a metal material, the tensile strength of which is greatly improved compared to the conventional one.

The first step of manufacturing another embodiment of the present invention is shown in FIG. 2(a), the second step is shown in FIG. 2(b), and the third step is shown in FIG. 2(C).
Show K.

In the first stage of this embodiment shown in FIG. 2(a), the core material 9
and an inner and outer cylinder 10 made of laminated materials sandwiching the same core material 9.
．． 9 parts of the core material at the end of the CFRP sandwich structure consisting of 11 are scooped out, and the aluminum alloy insert 13 is removed.
Make a recess for inserting.

In the second stage of this embodiment shown in Fig. 2(b) K, the intermediate material covering the inner and outer surfaces of the aluminum alloy insert 13 having a thick tip is divided into two parts, one for the inner side and one for the outer side. The cylinders 18 and 19 are made and attached to the aluminum alloy insert 13 at the contact surface with the insert 13 and the cylinder 1.
8. Glue the contact surfaces between 19.

In the next third step of this embodiment shown in FIG. 2(C), bonding is performed.

In view of the above, this embodiment also made it possible to manufacture a dissimilar material joint having the same strength as that of the above-mentioned embodiment.

〔Effect of the invention〕

In the present invention, a concave portion is created at the end of a cylindrical body made of CFRP material, and an intermediate material divided into two parts, one for inside and one for outside, is bonded to the inner and outer surfaces of the insert part, which has a thickened tip of the cylindrical body made of metal material. However, by inserting and bonding the cylindrical body made of the metal material into the recessed part of the cylindrical body made of the CFRP material, it has become possible to manufacture a dissimilar material joint with significantly improved tensile strength compared to the conventional method.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of one embodiment of the present invention, Fig. 2 is an explanatory diagram of another embodiment of the present invention, Fig. 3 is an explanatory diagram of the structure of an underwater vehicle, and Fig. 4 is an explanatory diagram of a conventional different material. FIG. 5 is an explanatory diagram of an example of a joint, and FIG. 5 is an explanatory diagram of another example of a conventional dissimilar material joint. 9... Core material, 10.11... Cylinder made of laminated material, 12, 16.17, 18.19... Intermediate material, 13.
...Insert, 14...Mechanical joint fitting. Agent Patent attorney Akira Sakama and 2 other people 1st ward

Claims (1)

[Claims] The core material is sandwiched between the inner cylinder and outer cylinder made of CFRP (CarbonF).
In a dissimilar material joint in which a cylindrical body made of iberReinforcedPlastic material and a cylindrical body made of a metal material having an insert part are joined via an intermediate material,
The core material at the end of the cylindrical body made of CFRP material is scooped out to create a recessed part, and then the thin part of the insert part made by thickening the tip of the cylindrical body made of metal material is filled in to form a cylinder whose outer shape is made of the above-mentioned CFRP material. An intermediate material processed to have the same shape as the recessed part of the body and divided into two parts, one for the inner surface and one for the outer surface, is attached and glued to the inner and outer surfaces of the insert part, and then the above C
A method for producing a dissimilar material joint, comprising inserting and adhering an insert portion to which an intermediate member of the cylindrical body made of the above metal material is adhered, into a concave portion of a cylindrical body made of FRP material.