JPS62192271A - Plasma torch - Google Patents
Plasma torchInfo
- Publication number
- JPS62192271A JPS62192271A JP61032921A JP3292186A JPS62192271A JP S62192271 A JPS62192271 A JP S62192271A JP 61032921 A JP61032921 A JP 61032921A JP 3292186 A JP3292186 A JP 3292186A JP S62192271 A JPS62192271 A JP S62192271A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- magnetic field
- nozzle
- cylindrical
- solenoid coil
- 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.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 35
- 230000004907 flux Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 15
- 238000005520 cutting process Methods 0.000 claims description 11
- 239000003302 ferromagnetic material Substances 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005294 ferromagnetic effect Effects 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 10
- 239000000498 cooling water Substances 0.000 description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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〉
本発明は鋼板等の被切断材を高速で切断するトランスフ
ァ型プラズマトーチに関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a transfer type plasma torch for cutting materials such as steel plates at high speed.
〈従来の技術〉
本発明者らは、被切断材を切断するプラズマトーチにつ
いて電極の耐用時間の長期化を企図したものを既に開発
した。<Prior Art> The present inventors have already developed a plasma torch for cutting a material to be cut, which is intended to extend the service life of the electrode.
の
第４図はこのプラズマトーチ縦断面図である。図示のよ
うに、先端に向って漏斗状に絞られた外筒ノズル１はそ
の外周の水冷外筒２と水密に連結されており、外筒ノズ
ル１と水冷外筒２どの間の空所に供給パイプ３から冷却
水を供給すると共に該空所内の加熱された冷却水を排出
パイプ４から排出することにより、外筒ノズル１は後述
する切断作業時に冷却されるようになっている。また外
筒ノズル１の」二部には多数の作動ガス噴出口６が設け
られており、これら噴出口６にチャンバ５を介して連通
した作動ガス供給パイプ７からアルゴン、水素、空気、
酸素等の作動ガスを外筒ノズル１内へ供給するようにな
っている。FIG. 4 is a longitudinal sectional view of this plasma torch. As shown in the figure, the outer cylinder nozzle 1, which is narrowed into a funnel shape toward the tip, is watertightly connected to the water-cooled outer cylinder 2 on its outer periphery. By supplying cooling water from the supply pipe 3 and discharging the heated cooling water in the space from the discharge pipe 4, the outer cylinder nozzle 1 is cooled during the cutting operation to be described later. Further, a large number of working gas nozzles 6 are provided in the second part of the outer cylinder nozzle 1, and a working gas supply pipe 7 communicating with these nozzles 6 via a chamber 5 supplies argon, hydrogen, air, etc.
A working gas such as oxygen is supplied into the outer cylinder nozzle 1.
外筒ノズル１内には先端に電極支持筒８を備えた通電パ
イプ１０が同軸に設けられており、通電パイプ１０及び
電極支持筒８はそれぞれ環状の電気絶縁体１４．１５を
介して外筒ノズル１内に支持されている。尚、絶縁体１
５にはスパイラル状に多数の通孔１５ａが設けられてお
り、作動ガス噴出口６を通して供給された作動カスを該
通孔１５ａを通して旋回させて外筒ノズル１の先端へ供
給するようになっている。Inside the outer cylinder nozzle 1, a current-carrying pipe 10 having an electrode support cylinder 8 at its tip is provided coaxially. It is supported within the nozzle 1. In addition, insulator 1
5 is provided with a large number of through holes 15a in a spiral shape, and the working waste supplied through the working gas jet port 6 is rotated through the through holes 15a and supplied to the tip of the outer cylinder nozzle 1. There is.
電極支持筒８の先端にはタングステン、ハフニウム、ジ
ルコニウム等からなる円筒形電極９が設けられており、
また、電極支持筒８内には後述するように電極部に磁界
Ｇ１を生じさせて電極９上でプラズマアークを回転させ
る永久磁石２０が設けられている。A cylindrical electrode 9 made of tungsten, hafnium, zirconium, etc. is provided at the tip of the electrode support tube 8.
Furthermore, a permanent magnet 20 is provided in the electrode support tube 8 to generate a magnetic field G1 in the electrode portion and rotate the plasma arc on the electrode 9, as will be described later.
前記通電パイプ１０内には同軸に冷却水導管１１が設け
られており、冷却水導管１１に連結された冷却水供給パ
イプ１２から冷却水を供給し、通電パイプ１０に連結さ
れた冷却水排出パイプ１３から加熱された冷却水を排出
することにより、後述する切断作業時に円筒形電極９を
冷却する。尚、１６は通電パイプ１０と被切断月１８と
の間に介装されたプラズマ電源、１７は通電パイプ１０
と外筒ノズル１との間に介装されたパイロットアーク電
源である。A cooling water conduit 11 is provided coaxially within the energizing pipe 10, and cooling water is supplied from a cooling water supply pipe 12 connected to the energizing pipe 11, and a cooling water discharge pipe connected to the energizing pipe 10. By discharging heated cooling water from the cylindrical electrode 13, the cylindrical electrode 9 is cooled during cutting operations to be described later. In addition, 16 is a plasma power supply interposed between the current-carrying pipe 10 and the moon 18 to be cut, and 17 is the current-carrying pipe 10.
This is a pilot arc power supply interposed between the cylinder nozzle 1 and the cylinder nozzle 1.
上記構成のプラズマトーチの作用を説明する。まず、パ
イロットアーク電源１７により外筒ノズル１と電極９と
の間に電圧を印加して外筒ノズル１と電極９との間に小
電流のパイロットアークを発生させる。また、これと同
時に、作動ガス供給パイプ７から作動ガスをチャンバ５
、作動ガス噴出口６、通孔１５ａを通してパイロットア
ーク発生点まで供給する。これによって１通孔１５ａで
旋回流とされた作動ガスはパイロットアークの熱により
旋回プラズマ流となり、パイロンドプラズマとして外筒
ノズル１の先端より下方へ伸びる。The operation of the plasma torch configured as described above will be explained. First, a voltage is applied between the outer cylinder nozzle 1 and the electrode 9 by the pilot arc power supply 17 to generate a small current pilot arc between the outer cylinder nozzle 1 and the electrode 9. At the same time, the working gas is supplied from the working gas supply pipe 7 to the chamber 5.
, the working gas is supplied to the pilot arc generation point through the nozzle 6 and the through hole 15a. As a result, the working gas that has been turned into a swirling flow in the first through hole 15a becomes a swirling plasma flow due to the heat of the pilot arc, and extends downward from the tip of the outer cylinder nozzle 1 as a pyloned plasma.
そして、このパイロ・ントプラズマが被切断材１８に接
した後に、パイロットアーク電源１７からプラズマ電源
１Ｇに切換えて電極９と被切断材１８との間に電圧を印
加し、アークを電極９と被切断材１８との間に移行させ
て大電流（１００〜２５ＯＡ）のプラズマアークＰを電
極９と被切断材１８との間に発生させ、この被切断材１
８を切断する。この時、永久磁石２０の磁界Ｇ１による
磁力線の方向は切断電流の方向と常に交差しているため
、フレミングの左手の法則によってアーク点は円筒形電
極９上で回転することとなる。従って、円筒形電極９は
均一に加熱されることとなるため、この電極９は冷却水
供給パイプ１２から供給された冷却水により均一に冷却
されることとなる。After this pilot plasma comes into contact with the material to be cut 18, the pilot arc power source 17 is switched to the plasma power source 1G, a voltage is applied between the electrode 9 and the material to be cut 18, and the arc is applied between the electrode 9 and the material to be cut. A large current (100 to 25 OA) plasma arc P is generated between the electrode 9 and the workpiece 18, and the workpiece 18 is moved between the electrode 9 and the workpiece 18.
Cut 8. At this time, since the direction of the magnetic lines of force due to the magnetic field G1 of the permanent magnet 20 always crosses the direction of the cutting current, the arc point rotates on the cylindrical electrode 9 according to Fleming's left hand rule. Therefore, the cylindrical electrode 9 is uniformly heated, and therefore, the electrode 9 is uniformly cooled by the cooling water supplied from the cooling water supply pipe 12.
〈発明が解決しようとする問題点〉
」二部のように、切断作業時に円筒形電極９上のアーク
点を回転させると、電極９の加熱状態が均一化され、電
極９の消耗を軽減して耐用時間を長くし、切断作業能率
を向」ニさせることができる。しかしながら、この効果
をもたらす永久磁石２０は比較的小さな電極支持筒８内
に設けられているため、この永久磁石２０の寸法が小さ
くなって円筒形電極９先端での磁界強度が小さい。この
ため、アーク点の回転が十分に行われなかったり、或い
は、プラズマアークの作る磁界により永久磁石２０の磁
力が減少して上記効果が次第に薄れるという不具合があ
った。また、永久磁石２０を超高性能磁石にすることも
考えられるが、コスト面において非常な不利がある。<Problems to be Solved by the Invention> As shown in Part 2, when the arc point on the cylindrical electrode 9 is rotated during the cutting operation, the heating state of the electrode 9 is made uniform and wear and tear on the electrode 9 is reduced. This can extend the service life and improve cutting efficiency. However, since the permanent magnet 20 that provides this effect is provided within the relatively small electrode support tube 8, the size of the permanent magnet 20 is small and the magnetic field strength at the tip of the cylindrical electrode 9 is small. For this reason, there have been problems in that the arc point is not sufficiently rotated, or the magnetic field of the permanent magnet 20 is reduced by the magnetic field created by the plasma arc, and the above-mentioned effect is gradually weakened. It is also possible to use an ultra-high performance magnet as the permanent magnet 20, but this is very disadvantageous in terms of cost.
本発明は上記事情に鑑みなされたもので、円筒形電極上
の磁界強度を大きくすると共に安定化したプラズマトー
チを提供することを目的とする。The present invention was made in view of the above circumstances, and an object of the present invention is to provide a plasma torch that increases the magnetic field strength on a cylindrical electrode and is stabilized.
く問題点を解決するための手段〉
本願の第１の発明に係るプラズマトーチは、先端に円筒
形電極を有する電極支持筒の外周に、該電極支持筒と同
軸に先端に向って漏斗状に絞られた外筒ノズルを設け、
該外筒ノズルから作動ガスを供給しつつ前記電極と被切
断材との間にプラズマアークを発生させて該被切断材を
切断するプラズマトーチにおいて、前記電極部に作用す
る磁界を生じさせて該電極上でプラズマアークを回転さ
せるソレノイドコイルを前記外筒ノズルに設けたことを
特徴とする。Means for Solving Problems〉 The plasma torch according to the first invention of the present application has a cylindrical electrode on the outer periphery of the electrode support cylinder having a cylindrical electrode at the tip, and a funnel-like shape extending toward the tip coaxially with the electrode support cylinder. Equipped with a narrowed outer cylinder nozzle,
In a plasma torch that cuts a material by generating a plasma arc between the electrode and a material to be cut while supplying working gas from the outer cylindrical nozzle, a magnetic field acting on the electrode portion is generated to cut the material. A solenoid coil for rotating a plasma arc on an electrode is provided in the outer cylinder nozzle.
また、本願の第２の発明に係るプラズマトーチは、先端
に円筒形電極を有する電極支持筒の外周に、該電極支持
筒と同軸に先端に向って漏斗状に絞られた外筒ノズルを
設け、該外筒ノズルから作動ガスを供給しつつ前記電極
と被切断材との間にプラズマアークを発生させて該被切
断材を切断するプラズマトーチにおいて、前記電極部に
作用する磁界を生じさせて該電極上でプラズマアークを
回転させるソレノイドコイルを前記外筒ノズルに設ける
と共に、前記電極支持筒に前記ソレノイドコイルにより
作られる磁力線を収束させて前記電極部の磁束密度を高
める強磁性体を設けたことを特徴とする。Further, in the plasma torch according to the second invention of the present application, an outer tube nozzle is provided on the outer periphery of the electrode support tube having a cylindrical electrode at the tip, and is coaxial with the electrode support tube and narrowed in a funnel shape toward the tip. , in a plasma torch that generates a plasma arc between the electrode and the material to be cut while supplying working gas from the outer cylindrical nozzle to cut the material to be cut, generating a magnetic field acting on the electrode portion; A solenoid coil for rotating a plasma arc on the electrode is provided in the outer tube nozzle, and a ferromagnetic material is provided in the electrode support tube to converge the lines of magnetic force created by the solenoid coil and increase the magnetic flux density of the electrode portion. It is characterized by
く作 用〉
設置スペースが大きくとれる外筒ノズル側に設けた大型
のソレノイドコイルにより、円筒形電極部での磁界強度
を十分な大きさのものとすると共に安定化を図る。Function: The large solenoid coil installed on the outer cylindrical nozzle side, which requires a large installation space, ensures that the magnetic field strength at the cylindrical electrode part is sufficiently large and stabilized.
く実 施 例〉
本発明の実施例を図面に基づいて説明する。尚、前述し
た従来のプラズマトーチと同一部分には同一符号を付し
て重複する説明は省略する。Embodiments Examples of the present invention will be described based on the drawings. Incidentally, the same parts as those of the conventional plasma torch described above are given the same reference numerals, and redundant explanation will be omitted.
第１図は本発明の一実施例に係るプラズマトーチの縦断
面図、第２図はそのＩＩ −ＩＩ矢視断面図である。図
示のように、本実施例のプラズマトーチは、従来より設
けていた棒状の永久磁石２０の代りに強磁性体２４を設
け、外筒ノズルｌに環状のソレノイドコイル２８を設け
ている。尚、第１図中の２７はこのソレノイドコイル２
Ｂに電流を流す電源である。このソレノイドコイル２６
も、永久磁石２０と同様に、円筒形電極９部に磁界Ｇ２
を生じさせて電極９上でプラズマアークを回転させるも
のであり、ソレノイドコイル２６に電流を流すことによ
り得られる磁界Ｇ２の放射状の磁力線でフレミングの左
手の法則によりアーク点を円筒形電極９上で回転させる
。ここで、本実施例においては、電極９近傍の電極支持
筒８に強磁性体２４を設けているため、磁界Ｇ２の磁力
線が収束されて電極９部での磁束密度が高められており
、上記アーク点回転効果の高効率化が図られている。従
って、円筒形電極９の加熱状態を確実且つ十分に均一化
して、該電極９の耐用時間を長期化し、切断作業能率を
向上することができる。尚、ソレノイドコイル２６へ供
給する電流値を適当に調整することによりアーク点の回
転数を任意に調節することができるため、切断電流に応
じてアーク点の回転速度を調節することができ、プラズ
マトーチの使用電流範囲が拡大される。FIG. 1 is a longitudinal cross-sectional view of a plasma torch according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II--II. As shown in the figure, the plasma torch of this embodiment is provided with a ferromagnetic material 24 in place of the bar-shaped permanent magnet 20 provided conventionally, and an annular solenoid coil 28 is provided in the outer cylindrical nozzle l. In addition, 27 in Fig. 1 is this solenoid coil 2.
This is a power source that allows current to flow through B. This solenoid coil 26
Similarly to the permanent magnet 20, a magnetic field G2 is applied to the cylindrical electrode 9.
The plasma arc is rotated on the electrode 9 by causing a current to flow through the solenoid coil 26, and the radial lines of magnetic force of the magnetic field G2 are used to rotate the arc point on the cylindrical electrode 9 according to Fleming's left-hand rule. Rotate. Here, in this embodiment, since the ferromagnetic material 24 is provided in the electrode support tube 8 near the electrode 9, the lines of magnetic force of the magnetic field G2 are converged and the magnetic flux density at the electrode 9 portion is increased. The arc point rotation effect is highly efficient. Therefore, the heating state of the cylindrical electrode 9 can be reliably and sufficiently uniformized, the service life of the electrode 9 can be extended, and the cutting efficiency can be improved. Note that by appropriately adjusting the current value supplied to the solenoid coil 26, the rotation speed of the arc point can be adjusted arbitrarily, so the rotation speed of the arc point can be adjusted according to the cutting current, and the plasma The torch's usable current range is expanded.
第３図は本発明の他の一実施例に係るプラズマトーチの
縦断面図である。図示のように、本実施例のプラズマト
ーチは棒状の強磁性体２４を廃止し、環状のソレノイド
コイル２８のみを外筒ノズル１に設けている。本実施例
ではソレノイドコイル２Ｂによる磁界Ｇ２の磁力線でフ
レミングの左手の法則によりアーク点を円筒形電極９上
で回転させるが、この環状のソレノイドコイル２Ｂは前
記棒状の永久磁石２０よりはるかに大型であるため、強
磁性体２４が無くともアーク点回転効果を十分に達成す
ることができる。FIG. 3 is a longitudinal sectional view of a plasma torch according to another embodiment of the present invention. As shown in the figure, in the plasma torch of this embodiment, the rod-shaped ferromagnetic material 24 is eliminated, and only an annular solenoid coil 28 is provided in the outer cylinder nozzle 1. In this embodiment, the arc point is rotated on the cylindrical electrode 9 by Fleming's left-hand rule using the lines of magnetic force of the magnetic field G2 generated by the solenoid coil 2B, but this annular solenoid coil 2B is much larger than the rod-shaped permanent magnet 20. Therefore, the arc point rotation effect can be sufficiently achieved even without the ferromagnetic material 24.
〈発明の効果〉
本願の発明によれば、外筒ノズルに設けた大型のソレノ
イドコイル更には電極支持筒に設けた強磁性体により、
円筒形電極に作用する磁界強度を大幅に増加させること
ができるため、円筒形電極」−でアーク点を常に高速で
且つプラズマアークにより発生する磁界にも影響されず
に安定して回転させることができる。従って、円筒形電
極の１耐用時間を安定して長くすることができて作業能
率を向上させることができると共に、大幅なコスト増を
生ずることなく十分な磁界強度を得ることができる。<Effects of the Invention> According to the invention of the present application, the large solenoid coil provided in the outer tube nozzle and the ferromagnetic material provided in the electrode support tube,
Since the magnetic field strength acting on the cylindrical electrode can be greatly increased, the cylindrical electrode can constantly rotate the arc point at high speed and stably without being affected by the magnetic field generated by the plasma arc. can. Therefore, it is possible to stably lengthen the one service life of the cylindrical electrode, improve work efficiency, and obtain sufficient magnetic field strength without significantly increasing costs.
第１図は本発明の一実施例に係るプラズマトーチの縦断
面図、第２図はそのＩＩ −ＩＩ矢視断面図、第３図は
本発明の他の一実施例に係るプラズマト−チの縦断面図
、第４図は従来のプラズマトーチの縦断面図である。
図 面 中、
１は外筒ノズル、
８は電極支持筒、
９は円筒形電極、
１８は被切断材、
２４は強磁性体、
２６はソレノイドコイル、
Ｇ２は磁界、
Ｐはプラズマアークである。FIG. 1 is a longitudinal cross-sectional view of a plasma torch according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along arrow II-II, and FIG. 3 is a longitudinal cross-sectional view of a plasma torch according to another embodiment of the present invention. FIG. 4 is a longitudinal sectional view of a conventional plasma torch. In the drawing, 1 is an outer cylinder nozzle, 8 is an electrode support tube, 9 is a cylindrical electrode, 18 is a material to be cut, 24 is a ferromagnetic material, 26 is a solenoid coil, G2 is a magnetic field, and P is a plasma arc.
Claims (2)
該電極支持筒と同軸に先端に向って漏斗状に絞られた外
筒ノズルを設け、該外筒ノズルから作動ガスを供給しつ
つ前記電極と被切断材との間にプラズマアークを発生さ
せて該被切断材を切断するプラズマトーチにおいて、前
記電極部に作用する磁界を生じさせて該電極上でプラズ
マアークを回転させるソレノイドコイルを前記外筒ノズ
ルに設けたことを特徴とするプラズマトーチ。(1) On the outer periphery of the electrode support tube that has a cylindrical electrode at the tip,
An outer tube nozzle constricted into a funnel shape toward the tip is provided coaxially with the electrode support tube, and a plasma arc is generated between the electrode and the material to be cut while supplying working gas from the outer tube nozzle. The plasma torch for cutting the material to be cut is characterized in that the outer cylindrical nozzle is provided with a solenoid coil that generates a magnetic field acting on the electrode portion and rotates a plasma arc on the electrode.
該電極支持筒と同軸に先端に向って漏斗状に絞られた外
筒ノズルを設け、該外筒ノズルから作動ガスを供給しつ
つ前記電極と被切断材との間にプラズマアークを発生さ
せて該被切断材を切断するプラズマトーチにおいて、前
記電極部に作用する磁界を生じさせて該電極上でプラズ
マアークを回転させるソレノイドコイルを前記外筒ノズ
ルに設けると共に、前記電極支持筒に前記ソレノイドコ
イルにより作られる磁力線を収束させて前記電極部の磁
束密度を高める強磁性体を設けたことを特徴とするプラ
ズマトーチ。(2) On the outer periphery of the electrode support tube that has a cylindrical electrode at the tip,
An outer tube nozzle constricted into a funnel shape toward the tip is provided coaxially with the electrode support tube, and a plasma arc is generated between the electrode and the material to be cut while supplying working gas from the outer tube nozzle. In the plasma torch for cutting the material to be cut, the outer tube nozzle is provided with a solenoid coil that generates a magnetic field acting on the electrode section to rotate a plasma arc on the electrode, and the solenoid coil is provided in the electrode support tube. 1. A plasma torch characterized by comprising a ferromagnetic material that converges lines of magnetic force created by the ferromagnetic material and increases the magnetic flux density of the electrode portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61032921A JPS62192271A (en) | 1986-02-19 | 1986-02-19 | Plasma torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61032921A JPS62192271A (en) | 1986-02-19 | 1986-02-19 | Plasma torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62192271A true JPS62192271A (en) | 1987-08-22 |
Family
ID=12372366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61032921A Pending JPS62192271A (en) | 1986-02-19 | 1986-02-19 | Plasma torch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62192271A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02121300A (en) * | 1988-10-31 | 1990-05-09 | Fuji Denpa Koki Kk | Arc torch |
-
1986
- 1986-02-19 JP JP61032921A patent/JPS62192271A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02121300A (en) * | 1988-10-31 | 1990-05-09 | Fuji Denpa Koki Kk | Arc torch |
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