JPS6145340B2 - - Google Patents
Info
- Publication number
- JPS6145340B2 JPS6145340B2 JP7602879A JP7602879A JPS6145340B2 JP S6145340 B2 JPS6145340 B2 JP S6145340B2 JP 7602879 A JP7602879 A JP 7602879A JP 7602879 A JP7602879 A JP 7602879A JP S6145340 B2 JPS6145340 B2 JP S6145340B2
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- head
- lead wire
- hat
- stem lead
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
- H01J23/02—Electrodes; Magnetic control means; Screens
- H01J23/04—Cathodes
- H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
Landscapes
- Microwave Tubes (AREA)
Description
【発明の詳細な説明】
本発明は、電子レンジ等に用いられるマグネト
ロンの陰極構体の製造方法に係り、エンドハツト
の中央孔周縁部に突出形成した短筒状部に螺旋状
陰極の螺旋端部を嵌合させるとともに、前記エン
ドハツトの周辺部に形成した孔にステムリード線
の頭部を挿通し、かつ前記頭部に形成した凹溝ま
たは小孔に前記陰極の延長端部を挿入して、前記
頭部およびその近傍をアークにより溶融し、前記
エンドハツト、前記陰極および前記ステムリード
線を一体化せしめることを特徴とする。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cathode structure for a magnetron used in a microwave oven, etc., in which a helical end of a helical cathode is attached to a short cylindrical part protruding from the periphery of a central hole of an end hat. At the same time, the head of the stem lead wire is inserted into the hole formed in the periphery of the end hat, and the extended end of the cathode is inserted into the groove or small hole formed in the head. The present invention is characterized in that the head and its vicinity are melted by an arc to integrate the end hat, the cathode, and the stem lead wire.
一般に電子レンジ等に用いられる直熱形マグネ
トロンは第１図に示すように構成され、トリウム
タングステンからなる螺旋状の陰極１は、その一
端および他端に鑞付けされた第１および第２のエ
ンドハツト２，３ならびに同エンドハツト２，３
に鑞付けされた第１および第２のステムリード線
４，５とともに陰極構体を形成している。第１お
よび第２のエンドハツト２，３ならびに第１およ
び第２のステムリード線４，５は、モリブデン等
の高融点金属からなり、第１および第２のステム
リード線４，５はセラミツク等からなるカツプ状
の絶縁基体６とともにステムを形成している。 A directly heated magnetron generally used in microwave ovens and the like is constructed as shown in Fig. 1, in which a spiral cathode 1 made of thorium tungsten has first and second end hats brazed to one end and the other end. 2, 3 and the same end hat 2, 3
Together with the first and second stem leads 4, 5, which are brazed to the top, they form a cathode structure. The first and second end hats 2, 3 and the first and second stem lead wires 4, 5 are made of a high melting point metal such as molybdenum, and the first and second stem lead wires 4, 5 are made of ceramic or the like. Together with the cup-shaped insulating base 6, it forms a stem.
銅からなる陽極筒体７は、その内周面から陰極
１へ向つて突出する多数の陽極ベイン８を備え、
陽極筒体７の一方の開口端縁には第１の磁極片９
が、そして他方の開口端縁には第２の磁極片１０
がそれぞれ封着されている。１１は電磁波導出用
導体、１２は電磁波放出用アンテナを示す。 An anode cylinder 7 made of copper includes a large number of anode vanes 8 protruding from its inner peripheral surface toward the cathode 1,
A first magnetic pole piece 9 is provided at one opening edge of the anode cylinder 7.
, and a second magnetic pole piece 10 is provided at the other opening edge.
are each sealed. 11 is a conductor for deriving electromagnetic waves, and 12 is an antenna for emitting electromagnetic waves.
ここで、第１および第２のエンドハツト２，３
は、陰極１を支持するとともに陰極１の通電端子
となり、かつまた、第１および第２の磁極片９，
１０の各中央孔を実質的に閉塞する。 Here, the first and second end hats 2, 3
supports the cathode 1 and serves as a current-carrying terminal for the cathode 1, and also serves as the first and second pole pieces 9,
Each of the ten central holes is substantially occluded.
また、第１および第２のエンドハツト２，３の
各中央領域に突出形成された短筒状部２′，３′
は、陰極１の螺旋端部に嵌入して陰極端部と鑞付
けされている。 In addition, short cylindrical portions 2', 3' are formed protrudingly in the central regions of the first and second end hats 2, 3.
is fitted into the spiral end of the cathode 1 and brazed to the cathode end.
このように構成されたマグネトロンの陰極構体
の製造にさいしては動作時陰極の温度が1600℃〜
1650℃となるので、第２図に示すように陰極１と
第１のエンドハツト２との鑞付け部および第１の
エンドハツト２と第１のステムリード線４との鑞
付け部に、白金またはルテニウム・モリブデン合
金等の高価な高融点鑞材１３，１４を要し、しか
も、鑞付け前には所定量の鑞材（ペースト状）を
仮組立体の鑞付け予定個所に塗布しなければなら
ず、ここに多大の労力と時間とを要した。 When manufacturing the cathode structure of a magnetron constructed in this way, the temperature of the cathode during operation is 1600°C or more.
Since the temperature is 1650°C, as shown in FIG. - Requires expensive high melting point brazing material 13, 14 such as molybdenum alloy, and furthermore, a predetermined amount of brazing material (in paste form) must be applied to the parts of the temporary assembly to be brazed before brazing. , this required a great deal of effort and time.
本発明はかかる従来の欠点を除去するためにな
されたもので、本発明の陰極構体の製造方法を、
以下図面に示した実施例とともに説明する。 The present invention has been made to eliminate such conventional drawbacks, and the method for manufacturing a cathode structure of the present invention includes:
A description will be given below along with embodiments shown in the drawings.
第３図に符号１０で示す螺旋状陰極はトリウム
タングステンからなり、かつ延長端部１１を有し
ている。一方、符号２０で示す第１のエンドハツ
トはモリブデンからなり、その中央孔の周縁部
に、これより突出した短筒状部２１を有し、この
短筒状部２１に陰極１の螺旋端部が嵌合してい
る。そして、エンドハツト２０の周辺部に形成さ
れた孔２２には、第１のステムリード線４０の頭
部４１が挿通され、この頭部４１を横切つて貫通
する小孔４２に、陰極１０の延長端部１１が挿通
して係止されている。ただし、頭部４１に小孔４
２を形成する代りに、第４図図示のように凹溝４
３を形成し、この凹溝４３に陰極１０の延長端部
１１を挿通して係止させてもよい。 The spiral cathode, designated 10 in FIG. 3, is made of thoriated tungsten and has an extended end 11. On the other hand, the first end hat designated by the reference numeral 20 is made of molybdenum, and has a short cylindrical part 21 projecting from the periphery of its central hole, and the spiral end of the cathode 1 is attached to this short cylindrical part 21. They are mated. The head 41 of the first stem lead wire 40 is inserted into the hole 22 formed in the peripheral part of the end hat 20, and the extension of the cathode 10 is inserted into the small hole 42 passing through the head 41. The end portion 11 is inserted and locked. However, the small hole 4 in the head 41
2, instead of forming a groove 4 as shown in FIG.
3 may be formed, and the extended end 11 of the cathode 10 may be inserted and locked into this groove 43.
いずれにしても、この係止部をアーク、好まし
くはプラズマアーク溶接手段により溶融し、第５
図図示のように陰極１０、第１のエンドハツト２
０および第１のステムリード線４０の三者を一体
に溶着する。 In any case, this locking portion is melted by arc, preferably plasma arc welding means, and the fifth
As shown in the figure, a cathode 10, a first end hat 2
0 and the first stem lead wire 40 are welded together.
以上のように、本発明の陰極構体の製造方法に
よると、エンドハツトの周辺部に形成した孔にス
テムリード線の頭部を挿通し、かつこの頭部に形
成した小孔または凹溝に陰極の延長端部を挿通し
て係止させ、係止部をアークにより溶融させるの
であつて、ここに鑞材を要しないのみならず、鑞
材の過不足による陰極特性のばらつきも生じな
い。また、仮組立てに複雑な治具を要せず、溶融
期間中の各部材を高精度のもとに保持でき、かつ
また陰極およびエンドハツトの各機能に支障をき
たすこともなく、陰極構体の製造コストを低減さ
せることができる。 As described above, according to the method for manufacturing a cathode structure of the present invention, the head of the stem lead wire is inserted into the hole formed in the peripheral part of the end hat, and the cathode is inserted into the small hole or groove formed in the head. The extended end is inserted and locked, and the locked part is melted by an arc, so that not only no solder is required here, but also there is no variation in cathode characteristics due to excess or deficiency of solder. In addition, there is no need for complicated jigs for temporary assembly, each member can be held with high precision during the melting period, and the functions of the cathode and end hat are not affected, allowing the manufacture of cathode structures. Cost can be reduced.
第１図は従来のマグネトロンの側断面図、第２
図は同マグネトロンの陰極構体の一部分を拡大し
た側断面図、第３図は本発明の製造方法によつて
製造される過程の陰極構体の要部の斜視図、第４
図は本発明の他の実施例におけるステムリード線
端部の斜視図、第５図は本発明の製造方法によつ
て製造された陰極構体の要部の側面図である。
１，１０……陰極、２，２０……第１のエンド
ハツト、４，４０……第１のステムリード線、１
１……陰極の延長端部、２１……エンドハツトの
短筒状部、２２……エンドハツトの孔、４１……
ステムリード線の頭部、４２……小孔、４３……
凹溝。
Figure 1 is a side sectional view of a conventional magnetron, Figure 2 is a side sectional view of a conventional magnetron.
The figure is an enlarged side sectional view of a part of the cathode structure of the same magnetron, FIG. 3 is a perspective view of the main part of the cathode structure in the process of being manufactured by the manufacturing method of the present invention, and
The figure is a perspective view of the end of a stem lead wire in another embodiment of the present invention, and FIG. 5 is a side view of the main part of a cathode structure manufactured by the manufacturing method of the present invention. 1, 10... cathode, 2, 20... first end hat, 4, 40... first stem lead wire, 1
1... Extended end of cathode, 21... Short cylindrical part of end hat, 22... Hole of end hat, 41...
Head of stem lead wire, 42...Small hole, 43...
Concave groove.
Claims (1)
短筒状部に螺旋状陰極の螺旋端部を嵌合させると
ともに、前記エンドハツトの周辺部に形成した孔
にステムリード線の頭部を挿通し、かつ前記頭部
に形成した凹溝または小孔に前記陰極の延長端部
を挿入して、前記頭部およびその近傍をアークに
より溶融し、前記エンドハツト、前記陰極および
前記ステムリード線を一体化せしめることを特徴
とするマグネトロン用陰極構体の製造方法。1 Fitting the helical end of the spiral cathode into the short cylindrical part protruding from the periphery of the central hole of the end hat, and inserting the head of the stem lead wire into the hole formed at the periphery of the end hat, and Inserting the extended end of the cathode into a groove or small hole formed in the head, melting the head and its vicinity by an arc, and integrating the end hat, the cathode, and the stem lead wire. A method for manufacturing a cathode structure for a magnetron, characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7602879A JPS55166844A (en) | 1979-06-15 | 1979-06-15 | Manufacturing method of cathode structure for magnetron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7602879A JPS55166844A (en) | 1979-06-15 | 1979-06-15 | Manufacturing method of cathode structure for magnetron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55166844A JPS55166844A (en) | 1980-12-26 |
| JPS6145340B2 true JPS6145340B2 (en) | 1986-10-07 |
Family
ID=13593359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7602879A Granted JPS55166844A (en) | 1979-06-15 | 1979-06-15 | Manufacturing method of cathode structure for magnetron |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55166844A (en) |
-
1979
- 1979-06-15 JP JP7602879A patent/JPS55166844A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55166844A (en) | 1980-12-26 |
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