JPS61181047A - Internal cell of anode button and its manufacture - Google Patents

Abstract

PURPOSE:To establish energy saving by forming the contacted opening end face of an internal cell making contact with the inclined inner wall face of an external cell in a corrugated configuration over the entire circumference of the opening end face of the internal cell. CONSTITUTION:Cold rolling for a plate material of 42Ni-6Cr-Fe alloy is achieved under room temperature to form it into a thin plate, the thin plate is annealed for one hour under hydrogen atmosphere, thereafter it is cooled to the room temperature and cold rolling for it is achieved. When the obtained thin plate is annealed for 1hr under the hydrogen atmosphere, and thereafter an internal cell 2 having a predetermined configuration is produced by deep contraction machining the circumferential face at the lower end of the internal cell 2 is corrugated over the entire circumferential face. The internal cell 2 is set in the front body of the cell 1 consisting of the same mater ial and thickness as the internal cell 2 and an anode button is formed by press fitting after bending the opening end face of the cell 2. Thereby, because a working rate for achieving cold rolling can be increased, the number of rolling steps can be remarkably reduced and the number of annealing steps can also be reduced. Therefore, energy saving can be established.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an inner cell of an anode button and a method for manufacturing the same, and more particularly, to an inner cell of an anode button and a method for manufacturing the same, and more particularly, the present invention relates to an inner cell of an anode button and a method for manufacturing the same, and more particularly, to an inner cell of an anode button, a rotation phenomenon does not occur at a portion in contact with an inclined inner wall surface of an outer cell. This article relates to an inner cell and its manufacturing method.

[Technical background of the invention and its problems] An anode button is attached to the back of a cathode ray tube. This anode button has a shape as illustrated in the cross-sectional view, and is composed of an outer cell 1 and an inner cell 2. In use, the outer cell 1 is sealed and embedded in the back glass of the cathode ray tube, and the electrode for generating an electron beam is inserted into the central hole 2a of the inner cell 2 without movement.

The anode button is manufactured in a conventional manner. First, the material is 42Ni-8Cr-Fe.

4? A thin alloy plate such as Ni-8Cr-Fe is used.

Outer cell precursors and inner cells, each having an inclined side wall, are separately press-molded from these thin plates. Next, the inner cell is set in the outer cell precursor, and the open end of the outer cell precursor is bent inward and press-fitted to the inner cell.

In this way, the lower end of the opening of the inner cell 2 comes into strong contact with the inclined inner wall surface of the outer cell 1, and the inner cell 2 is fixed within the outer cell 1 by the crimping force of the bent end of the outer cell 1. .

However, if this crimping force is weak, or if the frictional resistance between the lower end surface of the inner cell 2 and the inclined inner wall surface of the outer cell L is small, the inner cell may rotate at the contact surface of both cells, causing the so-called looseness. Becomes a button.

When it comes to loose buttons, they are inserted into the center hole 2a.
One electrode will rotate, and the contact resistance will also increase, causing problems in normal emission of the electron beam.

The usual measures taken to prevent this rotation of the inner cell and the anode button from becoming a loose button are to roughen the inner wall surface by, for example, applying strip polishing to the inclined inner wall surface of the outer cell 1;
This method increases the friction with the lower end surface of the inner cell 2.

However, this method is difficult to apply to thin plate materials, and rust may occur in roughened areas.
Moreover, the problem of increased costs cannot be denied.

On the other hand, the inner cell is made by cold rolling and annealing a metal or alloy plate of a predetermined material several times to form a thin plate of a predetermined thickness, and then deep drawing the obtained thin plate to form the inner cell. It is manufactured by changing the shape and removing the edges that occur on the end surface. In this step, if the processing rate during cold rolling is too large, the grain structure of the rolled material will be ordered and anisotropy will occur. As a result, the elongation of the plate material becomes directional during deep drawing, and unevenness called "ears" occur on the lower end surface of the inner cell.

Therefore, in conventional inner cell manufacturing, in order to prevent the occurrence of the above-mentioned "edges", cold rolling is performed multiple times at a relatively small processing rate, and the processing rate is gradually accumulated. A method has been adopted in which a thin plate is formed in which the occurrence of anisotropy is suppressed as much as possible, and then deep drawing is performed on the thin plate.

However, in this conventional method, the number of steps leading to deep drawing is large, and many annealing treatments must be performed between each cold rolling process, resulting in high energy consumption.

Overall, this will inevitably lead to higher costs.

[Object of the Invention] An object of the present invention is to solve the above-mentioned problems and provide an inner cell that does not become a loose button and a method for manufacturing the same.

[Summary of the Invention] In the course of intensive research to achieve the above object, the inventors discovered that the rotational phenomenon of the inner cell is based on the magnitude of friction at the point of contact between the lower end of the inner cell [m] and the inclined inner wall surface of the outer cell. , or is regulated by the magnitude of the elastic force of the inner cell with respect to the force that tightens the inner cell. Therefore, unlike conventional measures, the lower end surface of the inner cell may be roughened or the lower end surface The rotating phenomenon of the inner cell can be suppressed by forming the inner cell into a shape that exerts a spring action. (1) If the inner cell shape is formed by deep drawing a plate material that undergoes a large processing rate during cold rolling.

We came up with the idea that "ears" occur on the end faces, and that these "ears" contribute to the effect (2), and based on this idea, we developed the inner cell of the present invention and its manufacturing method.

That is, the inner cell of the anode button of the present invention is characterized in that the contact opening end surface of the inner cell that contacts the inclined inner wall surface of the outer cell has a wavy uneven shape over the entire circumference of the inner cell opening end surface. , the manufacturing method is characterized in that a material plate is subjected to strong processing at a processing rate of 70% or more, preferably 80% or more, and even 90% or more, and then the processed plate is subjected to drawing processing.

In the inner cell of the present invention, the lower end circumferential surface, that is, the circumferential surface that contacts the inclined inner wall surface of the outer cell, has an uneven shape that is undulated as a whole. Due to this uneven shape, an elastic force is generated as a reaction force at the contact point of both cells against the crimping force applied from the bent part of the outer cell, so the inner cell is firmly fixed within the outer cell. This increases the strength of the press fit between the outer cell and the inner cell. In other words, the resistance to the rotational phenomenon of the inner cell increases. This uneven shape is a shape that is naturally generated on the lower end surface by the inner cell manufacturing method described later, and is not intentionally formed as a post-processing.

Such an inner cell can be manufactured through the following steps. The first step is to make 70% of the plate material of the specified material.
This is a step of forming a thin plate with a predetermined thickness by performing heavy processing at the above processing rate. The processing method is cold rolling. The thin plate obtained through this process is given anisotropy. At that time,
The processing rate needs to be 70% or more, and if this value is less than 70%, no anisotropy occurs.

The second step is a step in which the thin plate obtained in the first step is annealed and then subjected to drawing processing. The conditions during annealing cannot be determined unambiguously, as they are selected depending on the type of material of the target thin plate, the size of the processing rate in the first step, etc. Also, as the drawing process, conventional deep drawing is used. Just apply it.

The inner cell processed in this manner may be set as it is on the inclined inner wall of the outer cell precursor, and assembled into the outer cell by fitting and pressing in the same manner as in the prior art.

[Example of the Invention] A plate material of 42Ni-8Cr-Fe alloy having a thickness of 3.5 mm was cold rolled at room temperature to form a thin plate having a thickness of 1.2 mm. This thin plate was then annealed in a hydrogen atmosphere at 750° C. for 1 hour, cooled to room temperature, and cold rolled to a thickness of 0.3 mm. Therefore, the processing rate during this period is 75%.

The obtained thin plate was annealed at 750° C. in a hydrogen atmosphere for 1 hour, and then deep drawn to produce an inner cell of a predetermined shape.

The lower end circumferential surface of the inner cell was wavy over the entire circumference.

This inner cell was set in an outer cell precursor made of the same material and thickness, and its open end was bent and press-fitted to form an anode button.

When 100 anode buttons were manufactured using this method and the torque required to rotate the inner cell was measured, the average value was 8.3 kge cm, with a variation of 1.8 k.
g*ctm.

For comparison, a plate material of the same alloy as in the example was cold rolled into a thin plate with a thickness of 1.2 mm, annealed under the same conditions as in the example, and then cold rolled to a thickness of 0.5 mm. The processing rate at this time was 58%.

It was annealed again and then cold rolled to a thickness of 0.3 mm. The obtained thin plate was annealed at a processing rate of 40%, and then deep drawn under the same conditions as in the example to obtain an inner cell. The end face of the inner cell was smooth without any undulations.

When 100 anode buttons were manufactured under the same pressing conditions as in the example and the torque required to rotate the inner cell was measured, the average value was 5.7 kg* cm, and the variation was 2.1 kg* cs. Ta.

[Effects of the Invention] As is clear from the above explanation, the rotation phenomenon of the inner cell of the present invention is suppressed due to the spring effect exerted on the lower end circumferential surface, and the strength of press fitting with the outer cell is higher than that of the conventional one. Approximately 1.
It becomes 5 times larger. In addition, the manufacturing method allows for a large processing rate during cold rolling, so the number of rolling processes can be significantly reduced, and therefore the number of annealing processes can also be reduced, which greatly contributes to energy savings and at the same time enables cost reduction. do.

[Brief explanation of the drawing]

The figure is a cross-sectional view of the anode button. １・・・・・・・・・Outer cell 2・・・・・・・・・Inner cell 2a・・・・・・Center hole

Claims (1)

[Claims] 1. An anode button characterized in that the contact opening end surface of the inner cell that contacts the inclined inner wall surface of the outer cell has a wavy uneven shape over the entire circumference of the inner cell opening end surface. Inner cell. 2. A method for manufacturing an inner cell of an anode button, which comprises subjecting a material plate to strong processing at a processing rate of 70% or more, and then subjecting the processed plate to narrowing processing.