JPS5833720B2 - Kimitsufuushike - Snow Seizouhouhou Oyobi Reikan Atsetsusouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cold welding tool used for cold welding a hermetically sealed case having a cold welding structure.

1 and 2, the structure of a conventionally used hermetically sealed case having a cold welding structure and a cold welding tool used for cold welding the hermetically sealed case will be explained.

FIG. 1 is a sectional view of a conventionally used hermetically sealed case housing a crystal resonator after cold pressure welding.
It is drawn into a ■ shape, and furthermore, an external j-board extraction hole 1a is punched out in a part of the flat bottom 1a.

Similarly, the case lid 2 is drawn into the same dish shape as the case 1, including a flat bottom portion 2a, a side wall portion 2b, and a flange portion 2c.

Inside the case, metallized layers are formed on the top and bottom surfaces of the flat bottom portion 1a of the case 1, and a ceramic substrate 4 with external leads 3 embedded therein is fixed by brazing or the like, and a crystal vibration is applied to the ceramic substrate 4. The child piece 5 is fixed.

In a vacuum, the hermetically sealed case 1 is covered with a case lid 2, and the respective flanges 1c and 2c are cold welded using a cold welding tool to be described later.

FIG. 2 is a partial sectional view showing a state in which the hermetically sealed case 1 is cold welded using a conventional cold welding tool, and the same numbers as in FIG. 1 represent the same members.

The cold pressure welding tool is composed of a lower die 6 and an upper die 7. The lower die 6 is attached to a press base 8, and the upper die 7 is supported by a press cylinder shaft 9.

The lower die 6 and the upper die 7 are provided with hermetically sealed case loading portions 6a and 7a, respectively.

The flange portion 1c of the hermetically sealed case 1 is inserted into the lower die 6.
After loading the case into the hermetically sealed case loading section, the flange parts are aligned and the case lid 2 is covered.

Thereafter, the upper die 7 descends together with the press cylinder shaft 9, pressurizes the respective flanges 1c and 2c, and cold welding is performed.

However, in the conventional pressure welding tool, strain deformation occurs due to stress strain generated during cold pressure welding, cracks occur in the fixed portion of the ceramic substrate 4, and the airtightness deteriorates. Stress strain is also applied to the crystal resonator piece 5, resulting in deterioration of the characteristics of the crystal resonator.

Furthermore, the bulges of the flat bottom portions 1a and 2a increase the total thickness of the hermetically sealed case, which is not desirable for a crystal resonator for a wristwatch whose main objective is miniaturization.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, an object of the present invention is to provide a cold welding tool that can reduce the influence of stress strain in a cold welding process.

To achieve the above object, the gist of the present invention is that each of the lower die 6 and the upper die 7 is provided with a deformation regulating member for regulating strain deformation during the cold welding process. It is characterized by being provided in the hermetically sealed case loading sections 6a and 7a.

Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings.

FIG. 3 is a partial sectional view showing a state in which the hermetically sealed case 1 is cold welded using the cold welding tool of the present invention, and the same numbers as in FIG. 1 indicate the same members.

The cold press welding tool in FIG.
0 and 11 are fixed, the lower die 6 is supported and fixed to the press machine base 8, and the upper die 7 is supported and fixed to the press machine cylinder shaft 9, respectively.

Case deformation during cold welding occurs between the flat bottom portion 1a of the case 1 and the flat bottom portion 2a of the case lid 2 and the deformation regulating members 10 and 11, which are loaded in the hermetically sealed case loading portions 6a and 7a. The required air gap is provided to match.

Therefore, the strain and deformation that occurs in the flat bottom portions 1a and 2a due to the stress generated during cold welding is regulated by the deformation regulating members 10 and 11, so that the stress strain is
b and 2b, and the flat bottom portions 1a and 2a maintain their initial flatness, and the cold welding is completed.

Furthermore, FIG. 4 shows another embodiment of the present invention, in which double recesses 6c and 7c are provided in the hermetically sealed case loading portions 6a and 7a of the cold pressure welding tool, and deformation regulating members 20 and 21 are provided. Recesses 20a and 21a are provided in the double recesses 6c and 7c, and springs 22 and 23 are installed and supported between the double recesses 6c and 7c and the recesses 20a and 21a provided in the deformation regulating member. The flat bottom part 1a of
The deformation of 2a and 2a is restricted by spring pressure.

As described above, according to the present invention, by simply improving the pressure welding tool, the ceramic substrate 4 fixed to the flat bottom portion 1a of the hermetically sealed case 1 and the crystal resonator piece 5 fixed to the ceramic substrate can be The stress strain during cold welding can be significantly reduced, and since the hermetically sealed case does not bulge, the mounting surface has a flat shape, making it suitable for mounting in limited spaces such as watches. It has many effects such as being able to obtain a locking case.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the hermetically sealed soot. FIG. 2 is a partial sectional view of a hermetically sealed case cold welded using a conventional cold welding tool. FIG. 3 is a partial sectional view of a hermetically sealed case cold welded using the cold welding tool of the present invention. FIG. 4 is a partial cross-sectional view of another embodiment of the present invention. 1...Hermetically sealed case, 2...Case lid, 1a. 2a...Flat bottom, 5...Crystal resonator piece, 6,7...
... Cold pressure welding tool, 10, 11, 20, 21... Deformation regulating member.

Claims (1)

[Scope of Claims] 1. In the process of cold-welding an airtight sealing case and a case lid drawn into a substantially dish shape having a flat bottom portion, a side wall portion, and a flange portion, the airtight sealing case and the case lid are A method of manufacturing an airtight sealing case, characterized in that the flange portion of the lid is pressed into contact with the lid, and the flat bottom portion of the airtight sealing case is also pressurized to prevent deformation. 2. A cold pressure welding device used in the method for manufacturing a hermetically sealed case as set forth in claim 1 is constituted by an upper die and a lower die, and a gas provided in the upper die and the lower die. A cold pressure welding apparatus, characterized in that a hermetically sealed case loading section is provided with a deformation regulating member for regulating deformation that occurs during cold welding of the hermetically sealed case.