JPS60227986A - Joining method of members - Google Patents

Abstract

PURPOSE:To produce hollow members each having a through-hole with high efficiency and high accuracy by holding the joint parts between both members under low pressure, sealing hermetically the peripheries of the joint parts, communicating the inside and outside of the hollow parts and subjecting the joint parts to a hot hydrostatic treatment. CONSTITUTION:Plural pieces of the relatively long-sized hollow members 12 each having internally the through-hole 11 made into a square section are prepared and these hollow members 12 are disposed while the side faces thereof are brought into contact with each other. Plate-shaped sealing materials 13, 14 are disposed on both top and bottom surfaces and both side surfaces thereof. Plate- shaped sealing materials 16 having plural window parts 15 sized slightly larger than the section of each hole 11 are disposed to both end faces thereof. The peripheries of the parts where the respective materials 13, 14, 16 contact with each other and the window parts 15 of the materials 6 are subjected to electron beam welding to maintain the parts enclosed by the materials 13, 14, 16 in a vacuum state; at the same time, said parts are hermetically sealed 17 by the weld beads. The entire part of the members are then subjected to the hot hydrostatic treatment.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method for joining members, and particularly to a method for joining a hollow member and another member using hot isostatic pressure treatment. Related.

(Prior Art) For example, a member having a large number of through holes inside a relatively long plate-like body, such as the first wall of a fusion reactor blanket, has traditionally been made into a plate-like body by machining or electrolytic processing. However, this method had a problem in that workability was extremely poor and manufacturing became impossible if the plate-shaped body became long. Therefore, as a countermeasure to this problem, for example, as shown in Fig. 1, a large number of grooves 1...
A method of joining both members and sealing between the grooves 1.1 by placing the flat plate member 2b on the plate member 2a on which the grooves 1.1 are formed and performing electron beam welding between the grooves 1.1. It is possible to adopt this. Also, as shown in Figure 2,
Using members 2a, 2b that are substantially similar to those described above, both members 2a, 2
It is also conceivable to perform diffusion welding between grooves 1.1 of b.

(Problems to be Solved by the Invention) However, the former method has the disadvantage that the deformation caused by welding becomes quite large and that it is impossible to join the entire surface of the contact area between the valley grooves 1.1. is expected. In addition, in the latter method, since it is necessary to apply a relatively large pressing force between both members 2a and 2b, the cross section of the through hole is deformed, resulting in the disadvantage that a through hole with a predetermined shape cannot be obtained. It is expected that.

This invention has been made in view of the above, and its purpose is to provide a member joining method that can manufacture members such as the first wall of the fusion reactor blanket with high efficiency and precision.

(Means for Solving the Problems) A member joining method of the present invention that meets the above object is a member joining method for joining another member to the circumferential surface of a hollow member, in which the joining portion of both the members is maintained at a low pressure. In this state, the periphery of this joint is hermetically sealed, and then hot isostatic pressure treatment is performed while the inside and outside of the hollow part are communicated with each other.

(Function) As a result of the above, when hot isostatic pressure is applied, the joint between the hollow member and another member is pressurized from the inside of the hollow member and the outside of the other member, and The inside and outside of the hollow member will be kept at the same pressure. Since the inside and outside of the hollow member are kept at the same pressure in this way, the hollow member will not be deformed by pressure from the outside, and the pressure will not act directly on the joint. Therefore, it is possible to join with good accuracy and quality.

(Example) Next, a specific example of the member joining method of the present invention will be described in detail with reference to the drawings.

First, as shown in FIGS. 3 and 4, a plurality of relatively long hollow members 12 having a rectangular cross section and a through hole 11 having a rectangular cross section inside are prepared, and these hollow members 12...1
2 are placed with their sides touching each other. Next, plate-shaped sealing materials 13, 13, 14, 14 are arranged on both the upper and lower surfaces and both sides, and a plurality of windows with dimensions slightly larger than the cross section of each of the through holes 11 are provided on both end surfaces. A plate-shaped sealing material 16.16 having a diameter of 15 is placed. Then, electron beam welding is performed on each of the contact portions of the sealing materials 13.14.16 and the periphery of the window portion 15 of the sealing material 16, respectively.
The area surrounded by 6 is brought into a vacuum state, and this area is hermetically sealed with a weld bead. The entire member is then subjected to hot isostatic pressure treatment (for example, 1000
~2000℃, 1000~2000 Kgf/cJ)
administer.

As a result of the above, each joint, that is, the side surfaces of the hollow member 12 that contact each other, and the contact surfaces of the side surfaces of the hollow member 12 and each sealing material 13, 14, 16 are metallurgically joined,
It becomes possible to integrally form a member having a plurality of through holes, such as the first wall of a fusion reactor plunket. Further, when performing the hot isostatic pressure treatment as described above, the pressure inside and outside of the through hole 11 of the hollow member 12 is maintained at the same level, and the hollow member 12 is not deformed by pressure from the outside.

Moreover, in this case, the side surfaces of the hollow member 12.12 are pressurized by the pressure in the two holes 11.11 of the member 12.12, and the side surfaces of the hollow member 12 and each sealing material 13.1 are pressed together.
4. Pressure is applied between the contact surface of 16 by the pressure inside and outside of the through hole 11, and since pressure is applied directly to each joint, a joint with excellent accuracy and quality can be obtained. Is possible.

FIG. 5 shows an example of changing the shape of the hollow member 12, in which both the hollow member 12 and its through hole 11 are formed to have a triangular cross section.

In this embodiment as well, it is possible to manufacture a plate-shaped member having a large number of through holes using substantially the same procedure as described above.

Although the embodiments of the member joining method of the present invention have been described above, the member joining method of the present invention is not limited to the above embodiments, and can be implemented with various modifications.

For example, in the above example, the upper and lower surfaces, both longitudinal sides, and both end surfaces of the juxtaposed hollow members are covered with a sealing material. It is also possible to seal the area airtightly by electron beam welding. Furthermore, in addition to being used to manufacture the above-mentioned members, the method of the present invention may also be used to join one member into a hollow member and the other into a plate-like member. Note that, although electron beam welding is practically preferable as a means for sealing the periphery of the joint, the method is not particularly limited to this method.

(Effects of the Invention) The member joining method of the present invention is configured as described above, and therefore, according to the member joining method of the present invention,
It is possible to join a hollow member having a through hole with another member without deforming the through hole, and therefore, by using the method of the present invention, a hollow member having a large number of through holes, such as the first wall of a fusion reactor blanket, can be joined to another member without deforming the through hole. It becomes possible to manufacture components with high efficiency and precision.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams showing conventional examples, respectively.
FIG. 4 is a partially cutaway perspective view of the same embodiment, and FIG. 5 is an explanatory diagram showing a modified example of the hollow member. 11... Through hole, 12... Hollow member. Patent applicant: Kawasaki Heavy Industries, Ltd.

Claims (1)

[Claims] 1. In a member joining method in which another member is joined to the circumferential side of a hollow member, the joint between the two members is kept under low pressure and the area around the joint is hermetically sealed, and then the inside and outside of the hollow part are sealed. A member joining method characterized by performing hot isostatic pressure treatment in a state where the parts are communicated with each other.