JPH05185275A - Waving brazing filler metal and manufacture thereof - Google Patents

Abstract

PURPOSE:To reduce the developing ratio of voids at the time of melting by using a waving brazing filler metal having width within the width of a joining surface and continuous waving shape. CONSTITUTION:The waving brazing filler metal 3 having the waving width B within the width A of the joining surface 2 and the continuous waving shape is put on the joining surface 2 and joined with the objective material. Even at the time of brazing, as the brazing filler metal has the waving shape, this metal is stably put in between the joining surfaces. As the line having small contacting part to the joining surface becomes the starting point and spreads, the developing ratio of the voids at the time of melting is little and the air- tightness is good. As the manufacture of the waving brazing filler metal 3 is worked by using a forming machine, the product yield is high.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brazing filler metal used for brazing by abutting surfaces with each other and a method for manufacturing the brazing filler metal.

[0002]

2. Description of the Related Art As a brazing material for brazing surfaces to each other, for example, there are brazing materials for joint pipes and brazing materials for the electronic industry. Such a brazing filler metal is an annular brazing filler metal suitable for the joining surface shape, and a wire ring obtained by making a linear brazing filler metal into an annular shape by a coiling machine, or a washer obtained by punching a thin plate into an annular shape by pressing. There is a ring.

Particularly in recent years, there has been a great demand for annular brazing filler metal for magnetrons as electron tubes, and the contact area of the brazing filler metal on the joint surface is large compared to the wire ring, and washer rings that are stable in installation are often used.

[0004]

However, since the wire ring has a small volume and thus the area of the joint surface is large, the brazing material is insufficient and sufficient brazing cannot be expected. There is a problem that it is difficult. Next, since the washer ring is formed by punching a thin plate having a predetermined thickness with a press, there is a problem that the material yield for obtaining one washer ring is very poor.

Further, in vacuum brazing, since a flat washer plays a packing-like role between joints, gas generated in the container during the brazing cannot be released and airtightness (vacuum degree) is impaired. There is a problem. Further, during brazing, if the washer ring is melted before the outer peripheral side, a void is generated on the inner peripheral side.

The present invention has been made in order to eliminate the above-mentioned drawbacks, has a good yield, and enables reliable brazing from a small contact area with the joint surface before brazing,
Another object of the present invention is to provide a brazing material that is easy to position and stable in installation, and a manufacturing method thereof.

[0007]

In order to achieve the above object, the brazing material in the present invention is a corrugated brazing material having a continuous corrugation with a width within the width of the joint surface. Further, the corrugated brazing filler metal is manufactured by forming a linear brazing filler metal into a continuous corrugation having a width within the width of the joint surface by a forming machine, a deforming roll or the like.

[0008]

According to the present invention having the above-mentioned structure, the linear brazing material is processed into a continuous corrugation by a forming machine, a deformed roller or the like. In this case, the shape of the corrugations may be arbitrary, but the width of the corrugations should be within the width of the joint surface to be brazed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The brazing wire used in the examples was 72Ag-Cu, which is the most commonly used brazing material for the electronic industry. FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

In the figure, reference numeral 1 is a part to be brazed, and a joint surface 2 to be brazed is a square flat surface. 3 is a corrugated brazing material. This corrugated brazing material 3
Is a continuous waveform having a width B within the width A of the joint surface 2 of the component 1. FIG. 2 is an explanatory view showing another shape of the corrugated brazing filler metal according to the present invention. The corrugated brazing filler metal according to the present invention has a triangular waveform as shown in FIG.
As shown in FIG. 2A, an arbitrary waveform such as a continuous square waveform or a smoother continuous waveform than a triangular waveform may be used, and the width of the waveform is formed within the width of the joint surface to be used.

The cross-sectional shape of the brazing material may be square, round or triangular as shown in FIG. 2 (b), or may be any other shape. FIG. 3 is an explanatory view showing the second embodiment of the present invention. In the figure, 4 is a cylindrical part to be brazed, and a joint surface 5 to be brazed.
Is an annular plane.

Reference numeral 6 is an annular corrugated brazing material. The annular corrugated brazing filler metal 6 has an annular shape along the shape of the joint surface 5, and has a width D within the width C of the joint surface 5 to form a continuous corrugation. Also in the case of the second embodiment, the corrugated shape of the annular corrugated brazing filler metal 6 may be any width within the width of the joint surface as described with reference to FIG. Is.

Next, a method for manufacturing the annular corrugated brazing material will be described. FIG. 4 is an explanatory view showing a first method for manufacturing an annular corrugated brazing material. The linear brazing material having a diameter of 1.0 mm shown in FIG. 4A is processed into a continuous triangular waveform as shown in FIG. In this case, the pitch at the apex of the triangle was 9 mm and the width was 5 mm. The brazing filler metal processed into this corrugation is wound around a cylinder, and when returned by spring back, it is straightened to have an outer diameter of 100 mm and then cut with a cutter to obtain an annular corrugated brazing filler metal of FIG. 4 (c). It was

FIG. 5 is an explanatory view showing a second method of manufacturing an annular corrugated brazing material. The wire brazing material having a diameter of 0.5 mm shown in FIG. 5 (a) was processed by a forming machine into a smoothly continuous waveform as shown in FIG. 5 (b). The pitch of the peaks of this waveform was 6 mm and the width was 4 mm. As shown in Fig. 5 (c), the brazing material processed into this corrugation has an outer diameter of 52 m.
m in a row so that it does not overlap the cylinder, and as shown in Fig. 5 (d), the cylinder is removed, and the corrugated brazing material rolled up in a cylindrical shape is cut in the generatrix direction into an annular body, and then cut The ends were welded to each other to obtain an unbroken annular corrugated brazing material shown in FIG.

In the embodiment of the present invention, 72 Ag
Although Cu is used, the brazing material is not limited to Ag brazing, but may be Pd brazing or Au brazing.

[0016]

As described above, according to the present invention, a corrugated brazing filler metal is formed by forming a linear brazing filler metal into a continuous corrugation within the width of the joint surface by a forming machine, a deforming roller or the like. It is manufactured. As described above, since the corrugated brazing filler metal manufactured according to the present invention is processed from the linear brazing filler metal, it is a significant product compared to the washer ring type brazing filler metal punched by the conventional rolling process. This has the effects of improving yield and reducing man-hours.

Also, during brazing, since the brazing material is corrugated, the installation is stable between the joining surfaces, and the lines (points) with few contact portions with respect to the joining surfaces spread out from the starting point. As compared with a washer ring that has a large contact area for installation, the void generation rate during melting is extremely low, and there is an effect that the best brazing material can be produced for brazing magnetrons and vacuum parts, where airtightness is the first priority.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a first embodiment of the present invention.

FIG. 2 is an explanatory view showing another shape of a brazing filler metal according to the present invention.

FIG. 3 is an explanatory diagram showing a second embodiment of the present invention.

FIG. 4 is an explanatory view showing a first method of manufacturing an annular corrugated brazing material.

FIG. 5 is an explanatory view showing a second manufacturing method of the annular corrugated brazing material.

[Explanation of symbols]

 1 Part 2 Bonding surface 3 Brazing material

Claims (2)

[Claims] 1. A corrugated brazing material having a width within the width of the joint surface and having a continuous corrugation. 2. A method for producing a corrugated brazing material, wherein the linear brazing material is formed into a continuous corrugation having a width within the width of the joint surface by a forming machine, a deforming roll or the like.