JPH0576734B2 - - Google Patents
Info
- Publication number
- JPH0576734B2 JPH0576734B2 JP58231302A JP23130283A JPH0576734B2 JP H0576734 B2 JPH0576734 B2 JP H0576734B2 JP 58231302 A JP58231302 A JP 58231302A JP 23130283 A JP23130283 A JP 23130283A JP H0576734 B2 JPH0576734 B2 JP H0576734B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- holes
- annular groove
- material plate
- electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 claims description 10
- 238000010894 electron beam technology Methods 0.000 claims description 5
- 238000004080 punching Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000005520 cutting process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/14—Manufacture of electrodes or electrode systems of non-emitting electrodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Punching Or Piercing (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は電子銃用電極部品の加工方法に係わ
り、特に主レンズを構成する電極部品の形成方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method of processing an electrode part for an electron gun, and particularly to a method of forming an electrode part constituting a main lens.
一般にインライン形カラー受像管においては、
フオーカス特性を改良する手段として電子銃電極
の主レンズ系の口径を大きくすることが行なわれ
ている。
In general, in-line color picture tubes:
As a means of improving focus characteristics, increasing the aperture of the main lens system of the electron gun electrode has been carried out.
従来、この種の電極は素材板をプレス成形する
ことにより形成されるが、第１図ａ，ｂに示すよ
うに電極構体１には電子ビーム通過孔１R，１G，
１Bがインライン状に配列されており、その孔１
Ｒ，１G，１B相互間の近接幅Ｗが極めて小さいた
め、中央電子ビーム通過孔１Gの内径が破線で示
すように電極構体１の短辺方向に大きくなり、か
つ電極構体１の長辺部がその中央部で最大となる
ように短辺方向に凸変形しやすくなる。このた
め、中央電子ビーム通過孔１Gの穴径精度や穴縁
周囲の平面度などが低下しやすくなり、これによ
つてフオーカス特性が影響を受けやすくなる欠点
があつた。 Conventionally, this type of electrode is formed by press-molding a material plate, but as shown in FIGS. 1a and 1b, the electrode structure 1 has electron beam passing holes 1 R , 1 G ,
1 B are arranged inline, and the hole 1
Since the proximity width W between R , 1G , and 1B is extremely small, the inner diameter of the central electron beam passage hole 1G increases in the short side direction of the electrode structure 1, as shown by the broken line, and the length of the electrode structure 1 increases. The side portions are easily deformed convexly in the direction of the short sides so that the sides are maximized at the center. For this reason, the accuracy of the hole diameter of the central electron beam passage hole 1G and the flatness around the hole edge tend to deteriorate, resulting in a drawback that the focus characteristics are easily affected.
したがつて、本発明は、前述した従来の問題に
鑑みてなされたものであり、その目的とするとこ
ろは、電極部品が高精度で得られ、フオーカス特
性の優れたカラー受像管用電子銃を得ることがで
きる電子銃用電極部品の加工方法を提供すること
にある。
Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to obtain an electron gun for a color picture tube in which electrode parts can be obtained with high precision and excellent focus characteristics. An object of the present invention is to provide a method for processing electrode parts for an electron gun.
このような目的を達成するための本発明は、素
材板に相互に近接した複数の穴を形成する電子銃
用電極部品の加工方法において、穴の近接部周囲
に少なくとも素材の降伏点以上の圧縮応力を加え
ながらプレス打抜きを行い、穴周辺部に環状の凹
溝を形成するものである。
In order to achieve such an object, the present invention provides a method for processing an electrode part for an electron gun, in which a plurality of holes are formed in a material plate close to each other. Press punching is performed while applying stress to form an annular groove around the hole.
次に図面を用いて本発明の実施例を詳細に説明
する。
Next, embodiments of the present invention will be described in detail using the drawings.
第２図ないし第７図は本発明による電子銃用電
極部品の加工方法の一例を示す工程図である。こ
れらの図において、まず第２図に示すように素材
板１１にプレスにより下穴抜きを行なつて下穴１
２，１３，１４を形成する。この場合、下穴１
２，１３，１４よりも小さい径で数回に分割した
下穴抜きを前工程で行なつても良い。次に第３図
に示すように前述した下穴１２，１３，１４より
も径が大きくかつ各々同一径を有する円孔１５，
１６，１７をプレスにより形成することによつて
近接幅Ｗを極めて小さくすることができる。 FIGS. 2 to 7 are process diagrams showing an example of a method for processing an electrode component for an electron gun according to the present invention. In these figures, first, as shown in FIG.
2, 13, and 14 are formed. In this case, pilot hole 1
Preparatory hole punching may be performed in several steps with a diameter smaller than 2, 13, and 14 in the previous step. Next, as shown in FIG. 3, a circular hole 15, which has a larger diameter than the previously described prepared holes 12, 13, and 14 and has the same diameter,
By forming 16 and 17 by pressing, the adjacent width W can be made extremely small.
このとき、第３図、第４図に示すように両側の
円孔１５，１７の穴縁周囲に近接幅Ｗを越えない
範囲で第１の環状凹溝１５′，１７′が形成され、
中央円孔１６の穴縁周囲に前記第１の環状凹溝１
５′，１７′に重畳しない範囲で且つ長辺側（電極
のインライン方向と直角方向側）の領域部分を短
辺側（電極のインライン方向側）の領域部分より
大きな凹溝からなる異径形状の第２の環状凹溝１
６′が形成されるように、上記各々の穴縁周囲で
素材板１１の平面に対し垂直方向に少なくとも素
材板１１の降伏点以上の圧縮応力を加えながら、
プレス打抜きによつて加工を行ない、筒状の電極
構体１８を形成する。この場合、第５図に示すよ
うに各円孔１５，１６，１７の穴縁周囲には環状
工具跡が残ることになる。なお、素材板１１に加
える圧縮応力がその降伏点に満たない場合、上記
環状工具跡が残るまでには至らず、前述した従来
技術のように中央円孔の内径が電極構体の短辺方
向に大きくなつたり、また電極構体の長辺部がそ
の短辺方向に凸変形しやすくなり好ましくない。
次に第６図に示すように電極構体１８のフランジ
部１８ａには長辺側と短辺側との接続部に構造
上、僅かな段差ｌが生じる。このフランジ部１８
ａの切断時に、従来のフラツトな工具１９を用い
た場合、素材フランジに曲げ応力σを発生し、電
極構体１８底部の平面度や底部に穿設された複数
個の円孔１５，１６，１７の穴精度が低下しやす
くなる。そこで、第７図に示すように電極構体１
８のフランジ部１８ａ形状に合致した切断工具２
０を用い、フランジ部１８ａを形成することによ
り、電極構体１８の加工精度を高精度に維持でき
る。この場合、フランジ短辺部に工具跡が残る。 At this time, as shown in FIGS. 3 and 4, first annular grooves 15' and 17' are formed around the edges of the circular holes 15 and 17 on both sides within a range not exceeding the adjacent width W,
The first annular groove 1 is formed around the edge of the central circular hole 16.
5' and 17', and the area on the long side (the side in the direction perpendicular to the inline direction of the electrode) has a different diameter shape consisting of a concave groove that is larger than the area on the short side (inline direction of the electrode). second annular groove 1 of
While applying compressive stress at least equal to or higher than the yield point of the material plate 11 in a direction perpendicular to the plane of the material plate 11 around the edges of each of the holes, so that a
Processing is performed by press punching to form a cylindrical electrode structure 18. In this case, as shown in FIG. 5, an annular tool mark remains around the hole edge of each circular hole 15, 16, 17. Note that if the compressive stress applied to the material plate 11 is less than its yield point, the annular tool mark will not remain, and the inner diameter of the central circular hole will not extend in the direction of the short side of the electrode structure as in the prior art described above. This is undesirable because the electrode structure becomes large and the long sides of the electrode assembly tend to be deformed convexly in the direction of the short sides.
Next, as shown in FIG. 6, the flange portion 18a of the electrode assembly 18 has a slight step L due to its structure at the connection portion between the long side and the short side. This flange portion 18
If a conventional flat tool 19 is used when cutting a, a bending stress σ is generated in the material flange, and the flatness of the bottom of the electrode structure 18 and the plurality of circular holes 15, 16, 17 drilled in the bottom are affected. Hole accuracy tends to decrease. Therefore, as shown in FIG.
Cutting tool 2 that matches the shape of the flange portion 18a of 8
By forming the flange portion 18a using 0, the processing accuracy of the electrode assembly 18 can be maintained at high accuracy. In this case, tool marks remain on the short side of the flange.
このような方法によれば、各円孔１５，１６，
１７の穴縁周囲にそれぞれ凹溝１５′，１６′，１
７′が形成されるので、各円孔１５，１６，１７
近接部の材料の移動が拘束でき、穴径精度や穴縁
周囲の平面度などの高精度化がはかれる。 According to such a method, each circular hole 15, 16,
Concave grooves 15', 16', 1 are formed around the hole edges of 17, respectively.
7' is formed, so each circular hole 15, 16, 17
The movement of the material in the vicinity can be restrained, and high accuracy in hole diameter accuracy and flatness around the hole edge can be achieved.
なお、前述した実施例においては、円孔を形成
する場合について説明したが、本発明はこれに限
定されるものではなく、角孔あるいは楕円孔など
の場合に適用して同様の効果が得られることは勿
論である。 In addition, in the above-mentioned embodiment, the case where a circular hole is formed has been explained, but the present invention is not limited to this, and the same effect can be obtained by applying it to a case where a square hole or an elliptical hole is formed. Of course.
以上説明したように本発明によれば、複数個の
近接した穴を高精度で形成できるので、電子ビー
ム通過孔のピツチを拡げることなく、主レンズ系
の口径を大きくでき、フオーカス特性の優れた高
品質のカラー受像管用電子銃が得られるという極
めて優れた効果を有する。
As explained above, according to the present invention, a plurality of closely spaced holes can be formed with high precision, so the aperture of the main lens system can be increased without increasing the pitch of the electron beam passing hole, resulting in excellent focus characteristics. This has the extremely excellent effect of providing a high quality electron gun for color picture tubes.
第１図ａ，ｂは従来の電極構体の一例を示す要
部平面図、その断面図、第２図ないし第７図は本
発明による電子銃電極部品の加工方法の一例を示
す電極構体の工程図である。
１１……素材板、１２，１３，１４……下穴、
１５，１６，１７……円孔、１５′，１６′，１
７′……環状凹溝、１８……電極構体、１８ａ…
…フランジ部、１９，２０……フランジ切断工
具。
FIGS. 1a and 1b are plan views and cross-sectional views of essential parts showing an example of a conventional electrode structure, and FIGS. 2 to 7 are steps of the electrode structure showing an example of the method of processing an electron gun electrode component according to the present invention. It is a diagram. 11...Material board, 12,13,14...Prepared hole,
15, 16, 17... circular hole, 15', 16', 1
7'... Annular groove, 18... Electrode structure, 18a...
...Flange part, 19, 20...Flange cutting tool.
Claims (1)
過孔をインライン状に配列して形成する電子銃用
電極部品の加工方法において、前記孔のうち両側
の孔の穴縁周囲には前記近接した幅を越えない範
囲で第１の環状凹溝が形成され、中央の孔の穴縁
周囲には前記第１の環状凹溝に重畳しない範囲で
且つ前記インライン方向と直角方向側の領域部分
を該インライン方向側の領域部分より大きくした
第２の環状凹溝が形成されるように、前記各々の
穴縁周囲に前記素材板の平面に対し垂直方向に少
なくとも該素材板の降伏点以上の圧縮応力を加え
ながらプレス打抜きを行ない、該各々の穴縁周囲
に各々の環状凹溝を形成したことを特徴とする電
子銃用電極部品の加工方法。1. In a method for processing an electrode part for an electron gun, in which three electron beam passing holes are arranged in-line in a material plate in close proximity to each other, the adjacent holes are formed around the edges of the holes on both sides of the holes. A first annular groove is formed in a range not exceeding the width of the groove, and a first annular groove is formed around the hole edge of the central hole in an area that does not overlap with the first annular groove and is perpendicular to the inline direction. Compression at least equal to or higher than the yield point of the material plate is applied around the edge of each hole in a direction perpendicular to the plane of the material plate so that a second annular groove larger than the region on the inline direction side is formed. A method of processing an electrode part for an electron gun, characterized in that press punching is performed while applying stress, and annular grooves are formed around the edges of each hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23130283A JPS60124328A (en) | 1983-12-09 | 1983-12-09 | Machining process for electrode parts of electron gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23130283A JPS60124328A (en) | 1983-12-09 | 1983-12-09 | Machining process for electrode parts of electron gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60124328A JPS60124328A (en) | 1985-07-03 |
| JPH0576734B2 true JPH0576734B2 (en) | 1993-10-25 |
Family
ID=16921487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23130283A Granted JPS60124328A (en) | 1983-12-09 | 1983-12-09 | Machining process for electrode parts of electron gun |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60124328A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128A (en) * | 1980-04-01 | 1982-01-05 | Union Carbide Corp | Acid salt of certain polyester aminoorganosilane |
| JPS5711451A (en) * | 1980-06-24 | 1982-01-21 | Toshiba Corp | Manufacture of electrode element |
-
1983
- 1983-12-09 JP JP23130283A patent/JPS60124328A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57128A (en) * | 1980-04-01 | 1982-01-05 | Union Carbide Corp | Acid salt of certain polyester aminoorganosilane |
| JPS5711451A (en) * | 1980-06-24 | 1982-01-21 | Toshiba Corp | Manufacture of electrode element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60124328A (en) | 1985-07-03 |
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