JP2568598B2 - Plasma cutting torch - Google Patents
Plasma cutting torchInfo
- Publication number
- JP2568598B2 JP2568598B2 JP62309013A JP30901387A JP2568598B2 JP 2568598 B2 JP2568598 B2 JP 2568598B2 JP 62309013 A JP62309013 A JP 62309013A JP 30901387 A JP30901387 A JP 30901387A JP 2568598 B2 JP2568598 B2 JP 2568598B2
- Authority
- JP
- Japan
- Prior art keywords
- torch
- electrode
- working gas
- chip
- base material
- 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 - Fee Related
Links
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トーチに関す
るものである。Description: TECHNICAL FIELD 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は第３
図に示すものであり、９は作動ガスを圧縮し、トーチ先
端に送るコンプレッサー、10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、11はパワーを供給するた
めのプラズマ切断用電源、12は母材16と電源11を接続す
る接地ケーブル、13はプラズマ切断用トーチである。ト
ーチ13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14、トーチスイッチケーブル15より
構成される。2. Description of the Related Art An apparatus for a plasma arc cutting method using a working gas is the third type.
As shown in the figure, 9 is a compressor for compressing the working gas and sending it to the tip of the torch, 10 is a regulator for adjusting the secondary pressure of the working gas to a constant value, 11 is a plasma cutting power supply for supplying power, Reference numeral 12 denotes a ground cable for connecting the base material 16 and the power supply 11, and reference numeral 13 denotes a plasma cutting torch. The torch 13 includes a cooling cable 14 that has a built-in electric run and sends a working gas to the tip of the torch, and a torch switch cable 15.
従来の切断トーチ13の先端部17の形状について以下に
説明する。The shape of the tip 17 of the conventional cutting torch 13 will be described below.
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基材、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
るための小径の穴を有するオリフィス、５は導電部の外
部への露出を防止すると共に、トーチ本体金具４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（スプライン）を通過する作
動ガスをチップ冷却のための二次流として流す役割を有
するノズルであり、セラミック等の絶縁物で製作されて
いるものである。The tip structure of a conventional cutting torch is as shown in FIG. 1 is an electrode substrate in which a cathode material such as zirconium or hafnium is embedded at the tip, 2 is a chip for narrowing down a plasma arc and supplied to a base material, 3 is an electrode that electrically insulates the electrode 1 and the chip 2 and is supplied from a cable. An orifice 5 having a small-diameter hole for diverting the working gas and generating a swirling flow for contracting the plasma arc prevents the conductive portion from being exposed to the outside, and is screwed with the torch main body 4. This is a nozzle that has a function of fixing the electrode 1, the chip 2, and the orifice 3, and of flowing a working gas passing through a groove (spline) of the chip 2 as a secondary flow for cooling the chip. It is made of something.
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、熱による損傷を受けやすい、
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６とノズル５との間にも作動ガスを
流し、チップ２の冷却を行なっている。In the plasma arc cutting, a high-temperature plasma flow is narrowed in the chip 2, and in the contact cutting, the chip 2 is in contact with a heated base material, so that it is easily damaged by heat.
Therefore, as described above, the working gas is divided and the working gas is also flowed between the nozzle 6 and the groove 6 provided on the outer peripheral surface of the chip to cool the chip 2.
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、冷却ケーブル14から送り込まれた作動ガス
７は、トーチ本体金具４の中央部に設けられたガス通路
８を通過し、トーチ先端部に送られる。プラズマ切断ト
ーチにおいて、作動ガス７はプラズマアークを絞ると共
に、電極基材１やチップ２を強制冷却する役割をもつ。2. Problems to be Solved by the Invention As shown in FIG. 2, in the conventional tip structure of the plasma torch, the working gas 7 sent from the cooling cable 14 passes through a gas passage provided in the center of the torch main body 4. 8 and is sent to the tip of the torch. In the plasma cutting torch, the working gas 7 has a role of narrowing the plasma arc and forcibly cooling the electrode substrate 1 and the chip 2.
電極１やチップ２の冷却効果の大小は、両者の寿命に
大きな影響を有する。従来のトーチにおいてはトーチ本
体金具４に内接する電極１の冷却効果を向上させるた
め、トーチ本体金具４に多数のガス通路８を設けまず、
トーチ本体金具４を冷却し、それに内接する電極１を間
接的に冷却していた。The magnitude of the cooling effect of the electrode 1 and the chip 2 has a great influence on the life of both. In the conventional torch, in order to improve the cooling effect of the electrode 1 inscribed in the torch body fitting 4, a large number of gas passages 8 are first provided in the torch body fitting 4,
The torch main body fitting 4 is cooled, and the electrode 1 inscribed therein is indirectly cooled.
またガス通路８の加工はドリル加工等によりトーチ本
体金具４に小径の穴を多数個あけたり、あるいは、外面
スプラインを設けた上に更にパイプ状の金具をカン合さ
せた上、ロウ付け加工を施すなど、複雑な構造となって
いるため、加工コストが上がり、またその構造からトー
チの外径（φD1）が大となっていた。The gas passage 8 is formed by drilling a large number of small-diameter holes in the torch main body bracket 4 by drilling or the like, or by providing an external spline and further fitting a pipe-shaped bracket, followed by brazing. Because of the complicated structure of the torch, the processing cost increased, and the outer diameter (φD 1 ) of the torch was increased due to the structure.
トーチ本体外径の肥大化は切断のためのケガキ線を見
にくくするなど、作業の操作性を低下させる要因となっ
ていた。The enlargement of the outer diameter of the torch body made it difficult to see the marking line for cutting, causing a decrease in workability.
問題点を解決するための手段 上記問題点を解決するため、本発明のプラズマ切断用
トーチは、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連結するオリフィスによ
り、作動ガスをチップ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、トーチ本体金具の内面に
溝部を有し、かつ前記電極はこの電極の一部よりも太い
電極基材を備え、この電極基材が上記トーチ本体金具に
内接すると共に、前記溝部と電極基材壁面とで作動ガス
通路を形成し、さらに、前記作動ガス通路に前記作動ガ
ス通路の一部よりも広い空間を形成し、前記電極基材壁
面が直接前記空間を形成したものである。Means for Solving the Problems In order to solve the above problems, the plasma cutting torch of the present invention, an electrode having an electron emitting surface is placed at the center,
In a plasma cutting torch having a structure in which a working gas is diverted to the inner and outer surfaces of a chip by an orifice connected to a chip for contracting a plasma flow, a groove is formed on an inner surface of a torch body fitting, and the electrode is a part of this electrode. A thicker electrode base material, the electrode base material is inscribed in the torch body fitting, and a working gas passage is formed by the groove and the electrode base material wall surface; and further, the working gas passage is formed in the working gas passage. And a space wider than a part of the electrode substrate, and the wall surface of the electrode substrate directly forms the space.
作 用 上記構成において、冷却ケーブルより送り込まれた作
動ガスは、トーチ本体金具内面に設けられた溝部と電極
壁面とによって構成されたガス通路を通過して、先端部
に送られる。In the above configuration, the working gas sent from the cooling cable passes through the gas passage formed by the groove and the electrode wall provided on the inner surface of the torch main body fitting, and is sent to the distal end.
したがって、電極基材は作動ガスにより直接冷却され
るため、冷却効果が従来品より大となり、また構造も従
来品より、簡素化されるため、トーチ本体部外径が小さ
くでき、かつ加工費用も低減される。Therefore, the electrode substrate is directly cooled by the working gas, so that the cooling effect is larger than that of the conventional product, and the structure is simpler than that of the conventional product, so that the outer diameter of the torch body can be reduced and the processing cost is also reduced. Reduced.
実施例 第１図は本発明の実施例を示す。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
基材、２はプラズマ流を緊縮させるチップ、３は電極基
材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７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、４はその内面に半円あるいは角形の溝を有する
トーチ本体であり、５は導電部の外部への露出を防止す
ると共に、トーチ本体金具４と螺合することにより、電
極基材１、チップ２、オリフィス３を固定し、かつチッ
プ２の溝部を通過する作動ガスをチップ冷却のための二
次流として流す役割を有するノズルであり、セラミック
等の絶縁物で製作されているものである。また、20は空
間部であり、ガス通路８よりも広く形成されている。Embodiment FIG. 1 shows an embodiment of the present invention. 1 is an electrode substrate having a cathode material such as zirconium or hafnium embedded at its tip, 2 is a chip for contracting the plasma flow, 3 is an electrode that electrically insulates the electrode substrate 1 from the chip 2, and is an operation supplied from a fluid cable. An orifice 4 having a small-diameter hole for generating a swirl flow for shunting the gas 7 and contracting the plasma flow, 4 is a torch body having a semicircular or square groove on its inner surface, and 5 is outside the conductive portion. The electrode base 1, the chip 2, and the orifice 3 are fixed by screwing with the torch main body fitting 4 and the working gas passing through the groove of the chip 2 is secondary-cooled for chip cooling. The nozzle has a role of flowing as a flow, and is made of an insulating material such as ceramic. Reference numeral 20 denotes a space, which is formed wider than the gas passage 8.
作動ガス７は、トーチ本体金具４の内面に設けられた
半円あるいは角形の溝部と電極基材壁面とによって構成
されたガス通路８を通過するため、電極基材を直接冷却
することになり、さらに、途中に設けられた空間部20に
て作動ガス７が断熱膨張することになり、冷却効果が向
上すると共に構造・加工が簡単になるため、トーチ本体
の最外径（φD2）が小に押さえられるため、ケガキ線が
見やすくなり、かつ小型・軽量化できるため、作業性が
向上する。また加工コストも低減できる。Since the working gas 7 passes through the gas passage 8 formed by the semicircular or square groove provided on the inner surface of the torch main body fitting 4 and the electrode base material wall surface, the electrode base material is directly cooled, Further, since the working gas 7 adiabatically expands in the space 20 provided on the way, the cooling effect is improved and the structure and processing are simplified, so that the outermost diameter (φD 2 ) of the torch body is small. As a result, the marking line is easy to see, and the size and weight can be reduced, so that the workability is improved. Processing costs can also be reduced.
発明の効果 以上のように本発明は、電極基材の冷却効果を向上さ
せると共に、小型・軽量化でき、作業性も向上し、なお
かつ加工コストも低減できるなど、その効果は大なるも
のである。Advantageous Effects of the Invention As described above, the present invention improves the cooling effect of the electrode base material, and can reduce the size and weight, improve the workability, and reduce the processing cost. .
第１図は本発明の一実施例を示すプラズマ切断用トーチ
の断面図、第２図は従来のプラズマ切断用トーチの断面
図、第３図は一般的なプラズマ切断装置の斜視図であ
る。 １……電極基材、２……チップ、３……オリフィス、４
……トーチ本体金具、５……ノズル、６……チップ溝、
７……作動ガス、８……ガス通路、20……空間部。FIG. 1 is a sectional view of a plasma cutting torch showing one embodiment of the present invention, FIG. 2 is a sectional view of a conventional plasma cutting torch, and FIG. 3 is a perspective view of a general plasma cutting apparatus. 1 ... electrode base material 2 ... chip 3 ... orifice 4
...... Torch body bracket, 5 ... Nozzle, 6 ... Tip groove,
7 ... working gas, 8 ... gas passage, 20 ... space.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭62−124079（ＪＰ，Ａ) 特開 昭62−240170（ＪＰ，Ａ) 実公 昭39−5732（ＪＰ，Ｙ１) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-62-124079 (JP, A) JP-A-62-240170 (JP, A) Jiko 39-5732 (JP, Y1)
Claims (1)
き、プラズマ流を緊縮するチップと連結するオリフィス
により、作動ガスをチップの内外面に分流する構造を有
するプラズマ切断用トーチにおいて、トーチ本体金具の
内面に溝部を有し、かつ前記電極はこの電極の一部より
も太い電極基材を備え、この電極基材が上記トーチ本体
金具に内接すると共に、前記溝部と電極基材壁面とで作
動ガス通路を形成し、さらに、前記作動ガス通路に前記
作動ガス通路の一部よりも広い空間を形成し、前記電極
基材壁面が直接前記空間を形成したプラズマ切断用トー
チ。1. A torch for plasma cutting having a structure in which an electrode having an electron emitting surface is placed at a center and an orifice connected to a chip for contracting a plasma flow divides a working gas to inner and outer surfaces of the chip. Has a groove on the inner surface thereof, and the electrode has an electrode base material that is thicker than a part of the electrode, and the electrode base material is inscribed in the torch main body fitting and operates with the groove and the electrode base material wall surface. A plasma cutting torch in which a gas passage is formed, and a space wider than a part of the working gas passage is formed in the working gas passage, and the electrode base material wall directly forms the space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309013A JP2568598B2 (en) | 1987-12-07 | 1987-12-07 | Plasma cutting torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62309013A JP2568598B2 (en) | 1987-12-07 | 1987-12-07 | Plasma cutting torch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150479A JPH01150479A (en) | 1989-06-13 |
| JP2568598B2 true JP2568598B2 (en) | 1997-01-08 |
Family
ID=17987834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62309013A Expired - Fee Related JP2568598B2 (en) | 1987-12-07 | 1987-12-07 | Plasma cutting torch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2568598B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6207923B1 (en) | 1998-11-05 | 2001-03-27 | Hypertherm, Inc. | Plasma arc torch tip providing a substantially columnar shield flow |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62240170A (en) * | 1986-04-11 | 1987-10-20 | Akira Kanekawa | Torch |
-
1987
- 1987-12-07 JP JP62309013A patent/JP2568598B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01150479A (en) | 1989-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |