JPH01150480A - Torch for plasma cutting - Google Patents
Torch for plasma cuttingInfo
- Publication number
- JPH01150480A JPH01150480A JP62309014A JP30901487A JPH01150480A JP H01150480 A JPH01150480 A JP H01150480A JP 62309014 A JP62309014 A JP 62309014A JP 30901487 A JP30901487 A JP 30901487A JP H01150480 A JPH01150480 A JP H01150480A
- Authority
- JP
- Japan
- Prior art keywords
- chip
- tip
- guide nozzle
- working gas
- 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.)
- Granted
Links
Landscapes
- Plasma Technology (AREA)
- Arc Welding In General (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は作動ガスを用いるプラズマ切断用トーチに関す
るものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a plasma cutting torch using a working gas.
従来の技術
作動ガスを用いるプラズマアーク切断法の装置図は第３
図て示すものであり、１１は作動ガスを圧縮しトーチ先
端に送るコンプレッサー、２は作動ガスの２次圧力を一
定値に調整するレギュレーター、１３はパワーを供給す
るだめのプラズマ切断用電源、１４は母材１８と電源１
３を接続する接地ケーブル、１５はプラズマ切断用トー
チである。トーチ１６は電ランを内蔵し、かつ作動ガス
をトーチ先端部に送る冷却ケーブル１６とトーチスイッ
チケーブル１７により構成される。The equipment diagram of the plasma arc cutting method using conventional technology working gas is shown in the 3rd page.
11 is a compressor that compresses the working gas and sends it to the tip of the torch, 2 is a regulator that adjusts the secondary pressure of the working gas to a constant value, 13 is a plasma cutting power supply that supplies power, and 14 is base material 18 and power supply 1
A grounding cable connects 3, and 15 is a plasma cutting torch. The torch 16 has a built-in electric lamp and is composed of a cooling cable 16 and a torch switch cable 17 that send working gas to the tip of the torch.
本発明は切断トーチ１５の先端部１９の形状に関するも
のである。The present invention relates to the shape of the tip 19 of the cutting torch 15.
従来の切断トーチの先端部構造は第２図に示す通りであ
る。１は先端部にジルコニウムやハフニウム等の陰極材
料を埋め込んだ電極、２はプラズマアークを絞り母材に
供給するチップ、３は電極１とチップ２を電気的に絶縁
し、かつケーブルより供給された作動ガスを分流し、か
つプラズマアークを緊縮させる旋回流を発生させるだめ
の小径の穴を有するオリフィス、４は導電部の外部への
露出を防止すると共に本体ネジ金具８と螺合することに
より、電極１、チップ２、オリフィス３を固定し、かつ
チップ２の溝部６（スプライン部）を通過する作動ガス
をチップ冷却のだめの二次流として流す役割を肩するノ
ズルであり、セラミック等の絶縁物で裏作されているも
のである。The structure of the tip of a conventional cutting torch is shown in FIG. 1 is an electrode with a cathode material such as zirconium or hafnium embedded in the tip, 2 is a tip that squeezes the plasma arc and supplies it to the base material, and 3 is an electrode that electrically insulates electrode 1 and tip 2 and is supplied from a cable. The orifice 4, which has a small-diameter hole that separates the working gas and generates a swirling flow that constricts the plasma arc, prevents the conductive part from being exposed to the outside and is screwed into the main body screw fitting 8. It is a nozzle that fixes the electrode 1, chip 2, and orifice 3, and plays the role of flowing the working gas that passes through the groove 6 (spline part) of the chip 2 as a secondary flow for cooling the chip, and is made of an insulating material such as ceramic. This is something that has been faked.
プラズマアーク切断においては、チップ２において高温
のプラズマ流を絞り、また接触切断においては加熱され
た母材に接するために、熱による焼損を受けやすい。し
たがって前述のように作動ガスを分流し、チップ外周面
に設けられた溝部（スプライン）とノズル４との間にも
作動ガスを流しく二次流）、チップ２の冷却を行なって
いるが、従来品は十分なる冷却効果を得ているとは言い
難く、チップの焼損を早め、その結果、緊縮したプラズ
マアークの発生をそこない切断性能をも著しく悪化させ
る要因となっていた。In plasma arc cutting, the tip 2 constricts the high-temperature plasma flow, and in contact cutting, it comes into contact with a heated base material, so it is susceptible to burnout due to heat. Therefore, as mentioned above, the working gas is divided and the working gas is also flowed between the groove (spline) provided on the outer peripheral surface of the chip and the nozzle 4 (secondary flow) to cool the chip 2. Conventional products cannot be said to have a sufficient cooling effect, which accelerates the burnout of the tip and, as a result, impairs the generation of a tight plasma arc and significantly deteriorates the cutting performance.
発明が解決しようとする問題点
第２図に示すように、従来のプラズマトーチの先端構造
において、チップ２はオリフィス３やノズル４と電気的
に絶縁されていると共に熱的にも同様なことが言え、チ
ップの冷却はチップ自体の熱容量とチップの冷却のだめ
の作動ガス（二次流）の熱吸収によっている。Problems to be Solved by the Invention As shown in FIG. 2, in the conventional plasma torch tip structure, the tip 2 is electrically insulated from the orifice 3 and nozzle 4, and the same is true thermally. In other words, the cooling of the chip depends on the heat capacity of the chip itself and the heat absorption of the working gas (secondary flow) used to cool the chip.
チップの熱容量を大にするには単に寸法形状を犬きくす
れば良いが、トーチの機能性を考慮すると適当な方法で
はなく、また熱吸収を良くするためには、溝部（スプラ
イン）の数を増加させれば放熱は良くなるが熱容量が減
少するという背反した結果になるうえ、プラズマ流を緊
縮させるだめのチップ内部を流れる（１次流）の量が減
少し、分流がうまくいかない。また、従来品におけるチ
ップ外周面に設けた溝部（スプライン部）を通過する作
動ガス（２次流）はチップセンターと単に平行流であり
かつチップ外周面に沿った流れとはなっていないため作
動ガス（２次流）によるチップの冷却が不十分となり高
使用率において稼動させた場合、焼損を早め寿命を短か
くさせるといっだ問題点もあった。In order to increase the heat capacity of the tip, it is possible to simply increase the size and shape, but this is not an appropriate method considering the functionality of the torch, and in order to improve heat absorption, it is necessary to increase the number of grooves (splines). If it is increased, heat dissipation improves, but the heat capacity decreases, which is the opposite effect.In addition, the amount of flow (primary flow) inside the chip, which is meant to constrict the plasma flow, decreases, and the splitting does not work properly. In addition, in conventional products, the working gas (secondary flow) that passes through the groove (spline) provided on the outer circumferential surface of the chip simply flows parallel to the tip center and does not flow along the outer circumferential surface of the chip. If the chip is operated at a high usage rate due to insufficient cooling of the chip by the gas (secondary flow), there is a further problem that burnout is accelerated and the life is shortened.
問題点を解決するだめの手段
本発明は電子放射面を有する電極をセンターに置き、プ
ラズマ流を緊縮するチップと前記チップと前記電極を連
結する絶縁管を有し、作動ガスを前記絶縁管の内外面に
分流する構造を有するプラズマ切断トーチにおいて、前
記チップの外周部にガイドノズルを設け、前記ガイドノ
ズルの内壁を作動ガスの上流部から下流部に向けて絞り
、かつ。Means for Solving the Problems The present invention places an electrode having an electron emitting surface in the center, has a chip for constricting the plasma flow, and an insulating tube connecting the tip and the electrode, and directs the working gas through the insulating tube. In a plasma cutting torch having a structure in which the flow is divided into inner and outer surfaces, a guide nozzle is provided on the outer periphery of the tip, and an inner wall of the guide nozzle is narrowed from an upstream portion to a downstream portion of the working gas.
前記ガイドノズルの材質を銅または銅合金より製作し、
前記電極、前記絶縁管、前記チップ、前記ガイドノズル
を絶縁物からなるノズルによって固楚したものである。The material of the guide nozzle is made of copper or copper alloy,
The electrode, the insulating tube, the tip, and the guide nozzle are fixed by a nozzle made of an insulator.
作用
本発明のようなガイドノズルを設けると、チップ溝部（
スプライン部）を通過した作動ガスは、直進せずチップ
側面に強制的に当てられ、チップ側面に沿って流れる。Function When a guide nozzle as in the present invention is provided, the tip groove (
The working gas that has passed through the spline (spline section) does not travel straight, but is forcibly applied to the side surface of the chip and flows along the side surface of the chip.
またチップは熱伝導性の艮い銅または銅合金でつくられ
たガイドノズルと接しであるため、チップが吸収した熱
はガイドノズルに伝導する。ガイドノズル内壁はオリフ
ィス３外壁とで作動ガス通路を形成しており、放熱効果
があり、従来品のチップより熱容量は大となる。Also, since the tip is in contact with a guide nozzle made of thermally conductive copper or copper alloy, the heat absorbed by the tip is conducted to the guide nozzle. The inner wall of the guide nozzle forms a working gas passage with the outer wall of the orifice 3, which has a heat dissipation effect and has a larger heat capacity than conventional chips.
実施例
第１図は本発明の実施例であり、同図ａは要部断面図、
同図す、ｃはそれぞれＣＣ線断面図およびＤＤ線断面図
である。１は先端にジルコニウムあるいはハフニウム等
の陰極材料を埋め込んだ電極、２はプラズマ流を緊縮さ
せるチップ、３は電極１とチップ２を電気的に絶縁し、
流体ケーブルより供給された作動ガス５を分流すると共
に、プラズマ流を緊縮させる旋回流を発生させるための
小径の穴を有するオリフィス、７はチップ２とノズル４
とかん合し、銅あるいは銅合金からなるガイドノズルで
ある。４は導電部を保護するセラミック等からなるノズ
ルである。Embodiment FIG. 1 shows an embodiment of the present invention, and FIG.
In the figure, c is a sectional view taken along the CC line and a sectional view taken along the DD line, respectively. 1 is an electrode with a cathode material such as zirconium or hafnium embedded in the tip; 2 is a tip that constricts the plasma flow; 3 is an electrode that electrically insulates electrode 1 and tip 2;
An orifice having a small diameter hole for dividing the working gas 5 supplied from the fluid cable and generating a swirling flow that constricts the plasma flow; 7 is the tip 2 and the nozzle 4;
It is a guide nozzle made of copper or copper alloy. 4 is a nozzle made of ceramic or the like that protects the conductive part.
作動ガス６はオリフィス３の小穴より分流され、一方は
チップ２内壁を旋回しながらチップ先端部に流出し、他
方はチップ溝部（スプライン部）６を通過し、チップ外
壁とガイドノズル７の内壁により形成される小室を通っ
て流出する。The working gas 6 is divided from the small hole of the orifice 3, one side flows out to the tip end while swirling around the inner wall of the tip 2, and the other passes through the tip groove (spline section) 6 and is separated by the outer wall of the tip and the inner wall of the guide nozzle 7. It flows out through the chamber that is formed.
発明の効果
本発明は前述のガイドノズルを備えることにより、チッ
プの冷却効果が大幅に向上し寿命が従来の約２倍持たせ
ることができるため高使用率での切断対応ならびに、よ
り厚板切断への対応が行なえ、効果大なるものである。Effects of the Invention By being equipped with the guide nozzle described above, the present invention greatly improves the cooling effect of the chip and extends the lifespan to about twice that of conventional ones, making it possible to cut at high usage rates and cut thicker plates. It is possible to deal with this and it is highly effective.
さらに、ガイドノズル内径φＧを変更することにより電
極１とチップ２内壁を流れる作動ガス（−次流）とチッ
プ２外面を流れる作動ガス（二次流）の分流比率を切断
条件に応じて容易に変えることも可能である。Furthermore, by changing the guide nozzle inner diameter φG, it is possible to easily adjust the split flow ratio of the working gas flowing through the inner wall of the electrode 1 and tip 2 (-secondary flow) and the working gas flowing along the outer surface of the tip 2 (secondary flow) according to the cutting conditions. It is also possible to change.
第１図は本発明の実施例であるプラズマ切断トーチの先
端部の断面図、第２図は従来のプラズマ切断用トーチ先
端部の断面図、第３図はプラズマ切断装置の溝成図であ
る。
１ ・・・・・電極、２・・・・・・チップ、３・・・
・・・オリフィス、４・・・・・ノズル、５・・・・・
・作動ガス、６・・・・・・チップ溝部、了・・・・・
・ガイドノズル、８・・・・・・本体ネジ金具、９・・
・・・・トーチ本体給電部、１Ｑ・・・・・・０リング
、１１・・・・・・コンプレッサー、１２・・・・・・
レギュレーター、１３・・・・・・切断用電源、１４・
・・・・・接地ケーブル、１５・・・・・・プラズマ切
断トーチ、１６・・・・・・冷却ケーブル、１７・・・
・・・トーチスイッチケーブル、１８・・・・・母材、
１９・・・・・・トーチ先端部。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名／−
−−電極
？−チップ
３−ｍ＝オリフイス
４−−−ノス７し
５−−一作動〃゛ス
ロー 溝部
９−一一トーテオイ苓治覧部
（の、 ｔｏ−−−ｏソング
Ｉｂ）
（Ｑ）第２図
（ユノ
Ｃｂ） （Ｃ）Fig. 1 is a sectional view of the tip of a plasma cutting torch according to an embodiment of the present invention, Fig. 2 is a sectional view of the tip of a conventional plasma cutting torch, and Fig. 3 is a groove diagram of a plasma cutting device. . 1... Electrode, 2... Chip, 3...
... Orifice, 4 ... Nozzle, 5 ...
・Working gas, 6...Chip groove, completed...
・Guide nozzle, 8... Body screw fitting, 9...
...Torch main power supply section, 1Q...0 ring, 11...Compressor, 12...
Regulator, 13...Power supply for disconnection, 14.
...Ground cable, 15...Plasma cutting torch, 16...Cooling cable, 17...
...Torch switch cable, 18...Base material,
19...Torch tip. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
--Electrode? -Tip 3-m=Orifice 4--Nose 7 and 5--One action゛Slow Groove 9-11 To-to-I Rejiran part (to---o Song Ib)
(Q) Figure 2 (Yuno Cb) (C)
Claims (1)
を緊縮するチップと前記チップと前記電極を連結する絶
縁管を有し、作動ガスを前記絶縁管の内外面に分流する
構造を有するプラズマ切断トーチにおいて、前記チップ
の外周部にガイドノズルを設け、前記ガイドノズルの内
壁を作動ガスの上流部から下流部に向けて絞り、かつ、
前記ガイドノズルの材質を銅または銅合金より製作し、
前記電極、前記絶縁管、前記チップ、前記ガイドノズル
を絶縁物からなるノズルによって固定することを特徴と
するプラズマ切断用トーチ。A plasma cutting torch having a structure in which an electrode having an electron emitting surface is placed at the center, a tip for constricting a plasma flow, an insulating tube connecting the tip and the electrode, and a working gas is divided between the inner and outer surfaces of the insulating tube. A guide nozzle is provided on the outer periphery of the chip, and an inner wall of the guide nozzle is narrowed from an upstream part to a downstream part of the working gas, and
The material of the guide nozzle is made of copper or copper alloy,
A plasma cutting torch characterized in that the electrode, the insulating tube, the tip, and the guide nozzle are fixed by a nozzle made of an insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309014A JPH0832363B2 (en) | 1987-12-07 | 1987-12-07 | Torch for plasma cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309014A JPH0832363B2 (en) | 1987-12-07 | 1987-12-07 | Torch for plasma cutting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150480A true JPH01150480A (en) | 1989-06-13 |
| JPH0832363B2 JPH0832363B2 (en) | 1996-03-29 |
Family
ID=17987844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62309014A Expired - Lifetime JPH0832363B2 (en) | 1987-12-07 | 1987-12-07 | Torch for plasma cutting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0832363B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01150478A (en) * | 1987-12-07 | 1989-06-13 | Matsushita Electric Ind Co Ltd | Torch for plasma cutting |
| WO1990016140A1 (en) * | 1989-06-20 | 1990-12-27 | Kabushiki Kaisha Komatsu Seisakusho | Plasma torch |
| JPH0312399U (en) * | 1989-06-20 | 1991-02-07 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124079A (en) * | 1985-11-21 | 1987-06-05 | Matsushita Electric Ind Co Ltd | Plasma cutting torch |
| JPH01150478A (en) * | 1987-12-07 | 1989-06-13 | Matsushita Electric Ind Co Ltd | Torch for plasma cutting |
-
1987
- 1987-12-07 JP JP62309014A patent/JPH0832363B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62124079A (en) * | 1985-11-21 | 1987-06-05 | Matsushita Electric Ind Co Ltd | Plasma cutting torch |
| JPH01150478A (en) * | 1987-12-07 | 1989-06-13 | Matsushita Electric Ind Co Ltd | Torch for plasma cutting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01150478A (en) * | 1987-12-07 | 1989-06-13 | Matsushita Electric Ind Co Ltd | Torch for plasma cutting |
| WO1990016140A1 (en) * | 1989-06-20 | 1990-12-27 | Kabushiki Kaisha Komatsu Seisakusho | Plasma torch |
| JPH0312399U (en) * | 1989-06-20 | 1991-02-07 | ||
| US5233154A (en) * | 1989-06-20 | 1993-08-03 | Kabushiki Kaisha Komatsu Seisakusho | Plasma torch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0832363B2 (en) | 1996-03-29 |
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