JPS6351027A - Cathode assembling device for electrode gun - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cathode assembly apparatus for attaching a cathode to a cathode eyelet during the assembly process of an electron gun.

[Conventional technology]

FIG. 5 is a perspective view showing the entire conventional cathode assembly device (14 components), and FIG. 6 is an enlarged 1@ side view of the main part to explain the operation of this conventional device. In the figure, (1) is the base, (2a) + (2b) i′i welding power supply equipment (3)
The pressure electrode (8a) l <ab) is indicated by arrow A,
With the drive device 4 that moves forward and backward in conjunction with the B direction, (2a)
, (2b), (3), (8a), (lt)
) TE welding equipment k F4 completed.

(4) is the cathode assembly device 1m that suctions and holds the cathode (11); (5) ft is the electron gun assembly holding member;
6) is formed, and this air nozzle (6) V cathode eyelet 4, 1st to v, 3-electrode O→, Uka,
Insert the electron gun assembly 1.11 in which the electron gun assembly 1.11 is integrally assembled with the bead glass (not shown), and the second electrode α is inserted into the stepped portion (9).
The rear surface S of 4 is brought into contact with the position I2't, and this 1st gun holding member (5) is held in a fixed state.
8), moves forward and backward in the direction of arrow C, and the air nozzle (6
) from the tip (6a) of the cathode θυ (Xta)
Measure the distance Δd to
The electron gun assembly αQ is positioned so that the distance from the reference plane S to the front surface (XXa) of the cathode is a predetermined dimension.

When the electron gun assembly αQ is positioned in this way, the first pole (13) is moved from the front surface of the cathode (tl
The dimension Δd up to a) becomes the predetermined dimension. Under this state, the pressurizing electrodes (8a) + (ab) are advanced in the directions of arrows A and B, respectively, by the drive device (3), and the tips of the pressurizing electrodes (8al) and (8b1) are connected to the cathode holding rlf.
(4), press the cathode eyelet (6) and the cathode qυ with a force of 1 to 5 kg/cd,
Spot welding was carried out by passing welding current.

[The origin of the invention's solution]

In the conventional device, the position is determined based on the back surface S of the second electrode 01, so that the thickness t2 of the 2'' X-pole α, the thickness t2 of the 1st .
The variation in each dimension of the distance d12 of the 2g2 electrode (to), Q4, and the thickness tl of the first electrode C1', j becomes the distance dlK from the front surface of the first electrode q3 to the front surface (lla) of the cathode after assembly. There was a problem in that the characteristics of the electron gun, for example, the characteristics of the bright line erasing voltage, increased.

This invention was made to solve these problems, and even if the manufacturing variation of the electron gun assembly α1 and the FflU of the air micrometer are the same,
An object of the present invention is to obtain a cathode assembly device that can reduce variations in the distance dlK.

[Means for solving problems]

The present invention provides a projection positioning device that detects and positions a positioning mark formed at a predetermined position from the tip of an air nozzle by using image processing to match the positioning mark with the back surface of a first electrode of an electron gun assembly. And it's gold'+! j It is an enemy.

[Effect]

The projection positioning device is attached to the electron gun assembly holding member.
When the child gun assembly is held, the position where the positioning mark of the air nozzle matches the back surface of the first electrode is detected by image processing by a microcomputer, and the air nozzle is positioned at that position. Therefore, R-r! of the first electrode of the electron gun assembly! +7 to the tip of the air nozzle can be automatically positioned to the specified dimensions, and the distance dlK from the front surface of the cathode to the first electrode after assembly can be adjusted.
dimensional variation becomes smaller.

[Embodiments of the invention]

FIG. 1 is a perspective view 1 showing the overall configuration of an embodiment of the present invention.
, 02 is an enlarged sectional view of a main part for explaining the operation of this example. In the figure, (6b) is a positioning mark, which is formed at a position a distance dN from the tip (aa) of the air nozzle (6) with a 7-shape (1'4).

(17) moves the air nozzle (6) forward and backward, 1〆movement position, (l→ is throw jt+43, (1!J is microscope, (4)
The camera was photographed using a monitor ('9, 1i, 2011), and 0 to 2υ and not shown: fjll 1
1t determines the projection position 11 and constitutes a device. (B)
, (c) is the first. The second float position detection device includes a light emitter (22a), (28a) and a light receiver (22b), respectively.
), (28b), and the first float position detection device □□□ is the float (7) of the air micrometer (7).
The original position of a), that is, the frame r2- shown by the solid line in FIG.
The air micrometer (7a) is installed at a position before the air micrometer (7a) starts to operate, and detects the point in time when the air micrometer (7) starts to operate. In addition, the second float position detection catch 1n1231 is connected to the tip (6a) of the air nozzle (6) and the front surface (11a) of the cathode.
When the distance between the
The float (7a) that has come to the position indicated by the line is detected. Further, a control device (not shown) moves the movable table (8) at a high speed until the first float position detection device 114 detects the movement of the float (7a), and Control is performed such that the flow (7a) is switched to a slow speed when roasting starts, and the moving table (8) is stopped when the indicated value of Δd is reached.

The operation of this embodiment will be explained below. The cathode assembly apparatus is performed in the following order.

■ Attach the cathode α1) to the cathode holder 1 (4) by blowing it with air.

■ Place the electron gun assembly αQ on the electron gun holding member (5).

(2) Move the moving stage (8) to place the back of the first electrode σ1 within the field of view of the microscope 4. At this time, the projected image shown in FIG. 3(a) is displayed on the monitor (21). In the figure, (1
8a), (1, ia) is the first. Second electrode (13, α→
This is a lens-shaped shadow formed by the through hole (tab), (14b).

■ The air nozzle drive device a operates the air nozzle (
6) Proceed all the way in the direction of arrow C and stop at the point where the back surface S of the 11M pole 03 and the positioning mark (6b) match, as shown in FIG. 3(b). This positioning operation is determined by graphic processing by a microcomputer (not shown) and is performed by controlling the rotation angle of the stepping motor of the air nozzle drive device Q''I).

■ Next, move the moving table (8) and insert the cathode (
11) T-insert. At this time, a control device (not shown) causes the first float position detection device of the air micrometer (7) to move at a high speed (for example, 100° to 4°) until the flow (7a) starts to move. Second
When the float position detection device Z3) starts to detect the float (7a), the speed is slow (for example, 0.02 to 0.06).
Me 4. c), and when the air micrometer (7) indicates Δd, the moving table (8) is completely stopped.

This series of operations is performed automatically.

(2) Next, the pressurizing electrodes (8a) + (8b) are advanced by the drive device (3) in the directions of arrows A and B, respectively, to weld the cathode eyelet (6) and the cathode (1υ).

(2) The pressurized electrodes (8a) and (ab) are moved back, then the moving table (8) is moved back, and the electron gun Assemblage I700 to which the cathode 01) is attached is attached and detached, thereby completing the cathode assembly process.

As in this embodiment, when the electron gun assembly (1 (3) and the cathode (lυ) are positioned as the reference surface S at all corners of the back surface of the first electrode α], from the reference surface S to the front surface of the cathode (IX
The accuracy of the dimensions up to a) is (measurement accuracy of Δd) + (
h), and the conventional device has the second ')') l
i! 04) was positioned as the reference surface S, the variation in (d12+t2) is removed, so the variation in Δd becomes much smaller. For this reason, 1. The variation in dlK after t+Il becomes smaller,
Variations in the characteristics of the electron gun are also reduced.

〔Effect of the invention〕

This invention provides a positioning mark at a position of a predetermined dimension from the tip of the air nozzle of an air micrometer installed in the same city as the electron gun assembly holding member, and the positioning mark is placed in the 11th position of the electron gun assembly. The cathode and the electron gun assembly are assembled by positioning the electrodes so that their back faces coincide with each other, and using an air micrometer to position the cathode so that the dimension Δd to the front surface becomes a predetermined value. 1 vertical position, variations in the distance dlK from the A1 surface of the cathode to the front surface of the first electrode are reduced, and an electron gun with small variations in characteristics can be manufactured.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the overall configuration of an embodiment of the present invention;
FIG. 2 is an enlarged cross-sectional view of the main part of the barrel for explaining the operation of this embodiment, and FIG. 3 is a monitor projection view for explaining the positioning operation between the electron gun assembly attached to the electron gun assembly holding member and the air nozzle. , FIG. 4 is a diagram for explaining the operation of the air micrometer during the positioning operation between the cathode and the electron gun assembly, FIG. 5 is a perspective view showing the overall configuration of a conventional cathode assembly device, and FIG. FIG. 3 is an enlarged sectional view of a main part for explaining the operation. (3)...Press electrode drive device j piece, (8a), (a
b)...1 arc of pressure, (4)...cathode holding electrode,
(5)... Electron gun assembly lyrics component, (6)...
・Air nozzle, (6b)...Positioning mark, (7)
...Air micrometer, (8)...Moving table, aU
−・・Cathode, @・Cathode eyelet, qyu・
...electronic assembly, (I7)...air nozzle,
Driving device, 4...Microscope, (E)...Photographing 1 elephant dissection,
(En...Monitor, Jun, Darkness)...First. 2nd float position detection device. Note that the same reference numerals in each figure indicate the same or corresponding parts. No. 111 3: Pressure IIt l-ze erection device 8: Color movement table 74S
2 do 1 1e43 figure hanging 5 figure

Claims (1)

[Claims] (1) An electron gun assembly holding member in which an air nozzle of an air micrometer is coaxially formed, and a cathode holding electrode provided coaxially and opposite to this holding member;
a welding device for welding the cathode and the cathode eyelet of the electron gun assembly by advancing and retracting pressure electrodes from both sides of the holding electrode, and positioning and mounting the electron gun assembly on the holding member; In a cathode assembly device configured to measure the distance to the front surface of the cathode with a meter, position the holding member, and then weld it with the welding device, the cathode is formed at a predetermined dimension position from the tip of the air nozzle. and a projection positioning device that detects and aligns the positioning mark and the back surface of the first electrode of the electron gun assembly by image processing. Electron gun cathode assembly equipment.