JPS63248538A - Manufacture of plasma torch - Google Patents
Manufacture of plasma torchInfo
- Publication number
- JPS63248538A JPS63248538A JP8263887A JP8263887A JPS63248538A JP S63248538 A JPS63248538 A JP S63248538A JP 8263887 A JP8263887 A JP 8263887A JP 8263887 A JP8263887 A JP 8263887A JP S63248538 A JPS63248538 A JP S63248538A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- rod
- insertion hole
- metal rod
- rod 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 20
- 238000003780 insertion Methods 0.000 claims abstract description 14
- 230000037431 insertion Effects 0.000 claims abstract description 14
- 238000005304 joining Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims abstract 4
- 238000003754 machining Methods 0.000 claims abstract 2
- 239000007772 electrode material Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 238000009694 cold isostatic pressing Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 238000000462 isostatic pressing Methods 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 description 17
- 239000007789 gas Substances 0.000 description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 239000001301 oxygen Substances 0.000 description 7
- 229910052760 oxygen Inorganic materials 0.000 description 7
- 238000001816 cooling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 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
- 230000005611 electricity Effects 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
- 239000012212 insulator Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000002093 peripheral effect Effects 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、プラズマトーチの製造方法の改良に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an improvement in a method for manufacturing a plasma torch.
［従来の技術］
従来、プラズマトーチとしては、例えば第４図及び第５
図に示すものが知られている。[Prior Art] Conventionally, as a plasma torch, for example, as shown in FIGS.
The one shown in the figure is known.
図中の１は、先端部を漏斗状に絞り込んだノズルである
。このノズル１内には、絶縁体で作られた作動ガス旋回
円兼内筒固定環２を介して電極支持筒３が設けられてい
る。前記ノズル１の外周面には、ノズル１と水密構造に
して水冷外筒４が連結されている。この水冷外筒４には
、冷却水供給パイプ５及び冷却水排出バイブロが接続さ
れている。電極支持筒３は、通電パイプ７の先端部に取
付けられている。電極支持筒３内には、電極冷却水導管
８の先端部が挿入されている。電極支持筒３の先端部に
は、タングステン、ハフニウム、ジルコニムなどからな
る棒電極９が形成されている。1 in the figure is a nozzle with a funnel-shaped tip. Inside this nozzle 1, an electrode support cylinder 3 is provided via a working gas swirling circle/inner cylinder fixing ring 2 made of an insulator. A water-cooled outer cylinder 4 is connected to the outer peripheral surface of the nozzle 1 in a watertight structure. A cooling water supply pipe 5 and a cooling water discharge vibro are connected to this water-cooled outer cylinder 4. The electrode support tube 3 is attached to the tip of the current-carrying pipe 7. The tip of the electrode cooling water conduit 8 is inserted into the electrode support tube 3 . A rod electrode 9 made of tungsten, hafnium, zirconium, or the like is formed at the tip of the electrode support tube 3 .
前記ノズル１と通電パイプ７との間には、電気絶縁体で
作られた連結管１０が設けられている。この連結管１０
と作動ガス旋回円兼内筒固定環２との間のノズル１部分
には、作動ガス供給パイプ１１が接続されている。前記
電極冷却水導管８には、電極冷却水供給パイプ１２及び
電極冷却水排出パイプ１３が接続されている。前記ノズ
ル１は、電線１４を介してパイロットアーク電源１５に
接続されている。前記通電パイプ７は、電線１６を介し
てプラズマ電源１７に接続され、電線１６゜１８を介し
てパイロットアーク電源１５に接続されている。プラズ
マ電源１５は、電線１９を介して被切断材２０に接続さ
れている。しかして、電極支持筒３と被切断材２０との
間で、プラズマアーク２１．パイロットプラズマ２２及
びプラズマアーク（又はアーク）２３を発生するように
なっている。なお、第４図及び第５図中矢印（→）は、
冷却水の流れ方向を示し、斜線矢印（→）は作動ガスの
流れ方向を示している。A connecting pipe 10 made of an electrical insulator is provided between the nozzle 1 and the current-carrying pipe 7. This connecting pipe 10
A working gas supply pipe 11 is connected to a portion of the nozzle 1 between the working gas swirling circle and the inner cylinder fixing ring 2 . An electrode cooling water supply pipe 12 and an electrode cooling water discharge pipe 13 are connected to the electrode cooling water conduit 8 . The nozzle 1 is connected to a pilot arc power source 15 via an electric wire 14. The current-carrying pipe 7 is connected to a plasma power source 17 via an electric wire 16, and to a pilot arc power source 15 via an electric wire 16.18. The plasma power source 15 is connected to the material to be cut 20 via an electric wire 19. Thus, the plasma arc 21. A pilot plasma 22 and a plasma arc (or arc) 23 are generated. The arrows (→) in Figures 4 and 5 are
The direction of flow of cooling water is shown, and the diagonal arrow (→) shows the direction of flow of working gas.
しかして、プラズマアークを発生させる前にまず冷却水
をノズル冷却水供給パイプ５及び電極冷却水パイプ１２
からプラズマトーチ内に入れ、ノズル１及び電極支持筒
（チップ）３と棒電極９の冷却を開始する。次に、作動
ガス供給パイプ１１からアルゴン、水素、酸素、空気及
びそれ等の混合ガスを作動ガス供給パイプ１１からトー
チ内に入れ、ノズル１の先端から放出する。この時作動
ガスは、作動ガス旋回円兼内筒固定環２により旋回流と
なり、ノズル先端に供給される。次にパイロットアーク
電源１５を作動させ、第５図に示す如く、棒電極９とノ
ズル１との間に小電流のパイロットアーク２３を発生さ
せる。このパイロットアーク２３によって発生する熱に
よりノズル１の先端に供給された作動ガスは旋回プラズ
マ流となり、パイロットプラズマ２２としてノズル口か
ら下方へ伸びて行く。このパイロットプラズマ２２が被
切断材２０に接触した後、パイロットアーク電ｉ！！１
５を切り、同時にプラズマ電源１７を作動させ、アーク
２３を棒電極９と被切断材２０との間に移行させて大電
流（１００〜２５０Ａ）を流す。これによりプラズマア
ーク２１が発生し、被切断材２ｏを切断する。Therefore, before generating a plasma arc, cooling water is first supplied to the nozzle cooling water supply pipe 5 and the electrode cooling water pipe 12.
Then, the nozzle 1, the electrode support tube (chip) 3, and the rod electrode 9 are started to be cooled. Next, argon, hydrogen, oxygen, air, and a mixed gas thereof are introduced into the torch through the working gas supply pipe 11 and discharged from the tip of the nozzle 1. At this time, the working gas becomes a swirling flow due to the working gas swirling circle/inner cylinder fixed ring 2, and is supplied to the nozzle tip. Next, the pilot arc power supply 15 is activated to generate a small current pilot arc 23 between the rod electrode 9 and the nozzle 1, as shown in FIG. The heat generated by the pilot arc 23 causes the working gas supplied to the tip of the nozzle 1 to turn into a swirling plasma flow, which extends downward from the nozzle mouth as a pilot plasma 22 . After this pilot plasma 22 comes into contact with the material to be cut 20, pilot arc electricity i! ! 1
5, the plasma power source 17 is activated at the same time, the arc 23 is moved between the rod electrode 9 and the material to be cut 20, and a large current (100 to 250 A) is caused to flow. As a result, a plasma arc 21 is generated to cut the material to be cut 2o.
ところで、従来装置においては、棒電極９は第２図に示
す如く作製される。By the way, in the conventional device, the rod electrode 9 is manufactured as shown in FIG.
■まず、第２図（ａ）の金属棒３１を機械加工して所定
の形状の電極支持筒３を作る（第２図（ｂ）図示）。(1) First, the metal rod 31 shown in FIG. 2(a) is machined to form the electrode support cylinder 3 of a predetermined shape (as shown in FIG. 2(b)).
■次に、第２図（Ｃ）図示のかしめ用治具３２ａ、３２
ｂを用いて棒電極９を前記電極支持筒２内に圧入し、所
定の棒電極９を得る（第２図（ｄ）図示）。■Next, the caulking jigs 32a and 32 shown in FIG. 2(C)
The rod electrode 9 is press-fitted into the electrode support tube 2 using the rod electrode 9 to obtain a predetermined rod electrode 9 (as shown in FIG. 2(d)).
［発明が解決しようとする問題点］
しかしながら、従来装置によれば、棒電極９を電極支持
筒３に圧入する工程で、第６図の写真の模式図に示す如
く、電極支持筒３と棒電極９と密着する所がビヤダル状
に変形し、両者間の密着性が悪い。その結果、棒電極９
の冷却効率が極めて悪くなり、棒電極９の温度が昇温し
て溶融飛散速度が早くなる。従って、棒電極９の消耗が
激しくなり、電極寿命が短くなる。[Problems to be Solved by the Invention] However, according to the conventional device, in the step of press-fitting the rod electrode 9 into the electrode support tube 3, as shown in the schematic diagram of the photograph in FIG. The part that comes into close contact with the electrode 9 is deformed into a beadal shape, and the adhesion between the two is poor. As a result, the rod electrode 9
The cooling efficiency of the rod electrode 9 becomes extremely poor, the temperature of the rod electrode 9 rises, and the speed of melting and scattering increases. Therefore, the rod electrode 9 is severely worn out, and the life of the electrode is shortened.
本発明は上記事情に鑑みてなされたもので、電極寿命を
長くして切断作業による消耗品コストを大幅に低減し得
るプラズマトーチの製造方法を提供することを目的とす
る。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for manufacturing a plasma torch that can extend the life of the electrode and significantly reduce the cost of consumables for cutting operations.
［問題点を解決するための手段］
本発明は、電極支持筒の中心部に棒電極を配設し、該電
極支持筒と同軸になるように設けられ、かつ前記棒電極
の先端に向かって漏斗状に絞り込まれた外筒ノズルを有
し、前記棒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
、電極支持筒となる金属棒に棒電極となる電極材が挿入
される挿入孔を開けた後該挿入孔に電極材を挿入する工
程と、電極材封入用蓋を前記挿入孔に当てた後大気中又
は真空中で該蓋と金属棒とをシール溶接し電極材を封入
する工程と、冷間等方圧加圧加工または高温等方圧加圧
加工により電極材と金属棒とを密着接合した後該金属棒
を機械加工して電極支持筒を製作する工程とを具備する
ことを要旨とする。[Means for Solving the Problems] The present invention provides a rod electrode disposed in the center of an electrode support cylinder, provided coaxially with the electrode support cylinder, and extending toward the tip of the rod electrode. In a plasma torch that has a funnel-shaped outer cylinder nozzle and generates a plasma arc between the rod electrode and a material to be cut to cut the material, a rod is attached to a metal rod that serves as an electrode support tube. After opening an insertion hole into which an electrode material to become an electrode is inserted, inserting the electrode material into the insertion hole, and after applying a lid for enclosing the electrode material to the insertion hole, the lid and metal are placed in the air or in a vacuum. The process involves seal welding the electrode material to the rod and enclosing the electrode material, and after closely joining the electrode material and the metal rod by cold isostatic pressure processing or high temperature isostatic pressure processing, the metal rod is machined. The gist of the present invention is to include a step of manufacturing an electrode support tube.
［作用］
本発明によれば、
−〇−
（イ）、冷間等方圧加圧加工の際、棒電極にあらゆる方
向から圧力がかかり、棒電極の表面で金属棒は降伏し、
塑性変形を行うため、棒電極と電極支持筒の密着性が極
めて良好になる。[Function] According to the present invention, -〇- (a) During cold isostatic pressing, pressure is applied to the rod electrode from all directions, and the metal rod yields on the surface of the rod electrode,
Since plastic deformation is performed, the adhesion between the rod electrode and the electrode support tube is extremely good.
（ロ）、また、特に高温等方圧加圧加工の場合、高温で
加圧加工を行うため、接合的な効果が現われる。(b) Also, especially in the case of high-temperature isostatic pressure processing, since the pressure processing is performed at a high temperature, a bonding effect appears.
（ハ）、更に、上記（イ）と同様な理由により、棒電極
に比べ、一般に電極支持筒の線膨張率が大きいため、冷
却時に棒電極の回りに圧縮応力が発生し、両者の密着性
が極めて安定なものとなる。(c) Furthermore, for the same reason as (a) above, the coefficient of linear expansion of the electrode support cylinder is generally higher than that of the rod electrode, so compressive stress is generated around the rod electrode when it is cooled, and the adhesion between the two is reduced. becomes extremely stable.
（ニ）、上記（イ）の如く密着性が良いため、棒電極の
冷却が極めて効率よく行われ、棒電極のアーク発生点と
冷却水接触点との温度勾配を急峻にできる。しかして、
棒電極の消耗はアーク発生の点での棒電極の酸化飛散作
用によるが、アーク発生中酸素は棒電極のアーク発生点
よりも深部にまで拡散する。従って、この深部への酸素
の拡散速度が早いと、棒電極の消耗が激しくなるが、冷
却効率が向上すると棒電極の温度が下がり、酸素の拡散
速度を低下させることで棒電極の消耗を低減できる。(d) Since the adhesion is good as described in (a) above, the rod electrode can be cooled extremely efficiently, and the temperature gradient between the arc generation point of the rod electrode and the point of contact with the cooling water can be made steep. However,
The wear of the rod electrode is due to the oxidation scattering effect of the rod electrode at the point of arc generation, but during arc generation oxygen diffuses deeper than the arc generation point of the rod electrode. Therefore, if the rate of oxygen diffusion into this deep part is fast, the rod electrode will be worn out rapidly, but if the cooling efficiency is improved, the temperature of the rod electrode will be lowered, reducing the rate of oxygen diffusion and reducing the wear of the rod electrode. can.
［実施例］ 以下、本発明の一実施例を第１図を参照して説明する。[Example] An embodiment of the present invention will be described below with reference to FIG.
なお、本発明に係るプラズマトーチは従■まず、電極支
持筒となる金属棒３１（第１図（ａ）図示）に、棒電極
が挿入される挿入孔３３を開けた（第１図（ｂ）図示）
。In the plasma torch according to the present invention, first, an insertion hole 33 into which a rod electrode is inserted is opened in a metal rod 31 (shown in FIG. 1(a)) serving as an electrode support cylinder (see FIG. 1(b)). )Illustrated)
.
■次に、前記挿入孔３３に棒電極９を挿入した後、前記
挿入孔３３に電極材封入用蓋３４を当てた。次いで、大
気中又は真空中で前記蓋３４と金属棒３１をシール溶接
し棒電極９を封入したく第１図（Ｃ）図示）。なお、図
中の３５はシール溶接部である。(2) Next, after inserting the rod electrode 9 into the insertion hole 33, the electrode material enclosure lid 34 was placed on the insertion hole 33. Next, the lid 34 and the metal rod 31 are sealed and welded in the atmosphere or in a vacuum to encapsulate the rod electrode 9 (as shown in FIG. 1C). Note that 35 in the figure is a seal weld.
■更に、冷間等方圧加圧加工（ＣＩＰ）により（第１図
（ｄ）図示）、棒電極９と金属棒３１と密着接合した。(2) Furthermore, the rod electrode 9 and the metal rod 31 were closely joined together by cold isostatic pressing (CIP) (as shown in FIG. 1(d)).
なお、高温等方圧加圧加工（ＨＩＰ）により、接合を行
ってもよい。この後、前記金属棒３１を機械加工して電
極支持筒３を製作した（第１図（ｅ）図示）。Note that the bonding may be performed by high temperature isostatic pressing (HIP). Thereafter, the metal rod 31 was machined to produce the electrode support tube 3 (as shown in FIG. 1(e)).
上記実施例によれば、以下に述べる効果を有する。According to the above embodiment, the following effects are achieved.
（イ）、冷間等方圧加圧加工の際、棒電極９にあらゆる
方向から圧力がかかり、棒電極９の表面で金属棒３１は
降伏し、塑性変形を行うため、棒電極９と電極支持筒３
の密着性が極めて良好になる。(a) During cold isostatic pressing, pressure is applied to the rod electrode 9 from all directions, and the metal rod 31 yields on the surface of the rod electrode 9 and undergoes plastic deformation. Support tube 3
The adhesion becomes extremely good.
（口〉、また、高温等方圧加圧加工の場合、高温で加圧
加工を行うため、接合的な効果が現われる。(Note) Also, in the case of high-temperature isostatic pressure processing, since the pressure processing is performed at high temperature, a bonding effect appears.
（ハ）、更に、上記（イ）と同様な理由により、棒電極
９に比べ、一般に電極支持筒３の線膨張率が大きいため
、冷却時に棒電極９の回りに圧縮応力が発生し、両者の
密着性が極めて安定なものとなる。(c) Furthermore, for the same reason as in (a) above, the linear expansion coefficient of the electrode support cylinder 3 is generally larger than that of the rod electrode 9, so compressive stress is generated around the rod electrode 9 during cooling, and both The adhesion becomes extremely stable.
（ニ）、上記（イ）の如く密着性が良いため、棒電極９
の冷却が極めて効率よく行われ、棒電極９のアーク発生
点と冷却水接触点との温度勾配をＲ峻にできる。しかし
て、棒Ｎｍ９の消耗はアーク発生の点での棒電極９の酸
化飛散作用によるが、アーク発生中酸素は棒電極９のア
ーク発生点よりも深部にまで拡散する。従って、この深
部への酸素の拡散速度が早いと、棒電極９の消耗が激し
くなるが、冷却効率が向上すると棒電極９の温度が下が
り、酸素の拡散速度を低下させることで棒電極９の消耗
を低減できる。(d) Because of the good adhesion as described in (a) above, the rod electrode 9
cooling is performed extremely efficiently, and the temperature gradient between the arc generation point of the rod electrode 9 and the contact point of the cooling water can be made steeper. Therefore, the consumption of the rod Nm9 is due to the oxidation scattering effect of the rod electrode 9 at the point of arc generation, but during arc generation, oxygen diffuses deeper than the arc generation point of the rod electrode 9. Therefore, if the rate of oxygen diffusion into this deep part is fast, the rod electrode 9 will be worn out rapidly, but if the cooling efficiency is improved, the temperature of the rod electrode 9 will decrease, and by reducing the oxygen diffusion rate, the rod electrode 9 will be Can reduce wear and tear.
［発明の効果コ
以上詳述した如く本発明によれば、Ｎ極寿命を長くして
切断作業による消耗品コストを大幅に低減し得るプラズ
マトーチの製造方法を提供できる。[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a method for manufacturing a plasma torch that can extend the life of the N electrode and significantly reduce the cost of consumables for cutting operations.
第１図は本発明の一実施例に係るプラズマトーチの製造
方法を工程順に示す断面図、第２図は従来のプラズマト
ーチの製造方法を工程順に示す断面図、第３図は従来法
及び本発明法による電極寿命の特性図、第４図及び第５
図は夫々従来のプラズマトーチの断面図、第６図は従来
法による棒電極及び電極支持筒の断面図の写真の模式図
、第７図は本発明による棒電極及び電極支持筒の断面の
写真の模式図である。
１・・・外筒ノズル、２・・・旋回周兼内筒固定環、３
・・・電極支持筒、４・・・水冷外筒、５・・・冷却水
供給パイプ、６・・・冷却水排出パイプ、７・・・通電
パイプ、８・・・電極冷却水導管、９・・・棒電極、１
０・・・連結管、１１・・・作動ガス供給パイプ、１２
・・・電極冷却水供給パイプ、１３・・・電極冷却水排
出パイプ、１５・・・パイロットアーク電源、１７・・
・プラズマ電源、１９・・・プラズマ電源、２０・・・
被切断材、２１．２３・・・プラズマアーク、２２・・
・パイロットプラズマ、３１・・・金属棒、３３・・・
挿入孔、３４・・・′Ｒ極材封入用蓋、３５・・・溶接
シール部。FIG. 1 is a cross-sectional view showing a method for manufacturing a plasma torch according to an embodiment of the present invention in order of process, FIG. 2 is a cross-sectional view showing a conventional method for manufacturing a plasma torch in order of process, and FIG. Characteristic diagrams of electrode life according to the invention method, Figures 4 and 5
The figures are a cross-sectional view of a conventional plasma torch, FIG. 6 is a schematic diagram of a photograph of a cross-sectional view of a rod electrode and an electrode support cylinder according to a conventional method, and FIG. 7 is a photograph of a cross-section of a rod electrode and an electrode support cylinder according to the present invention. FIG. 1... Outer cylinder nozzle, 2... Rotating circumference and inner cylinder fixed ring, 3
... Electrode support cylinder, 4 ... Water cooling outer cylinder, 5 ... Cooling water supply pipe, 6 ... Cooling water discharge pipe, 7 ... Current supply pipe, 8 ... Electrode cooling water conduit, 9 ...rod electrode, 1
0... Connecting pipe, 11... Working gas supply pipe, 12
... Electrode cooling water supply pipe, 13 ... Electrode cooling water discharge pipe, 15 ... Pilot arc power supply, 17 ...
・Plasma power supply, 19...Plasma power supply, 20...
Material to be cut, 21.23... Plasma arc, 22...
・Pilot plasma, 31... Metal rod, 33...
Insertion hole, 34...'R-electrode material enclosure cover, 35...welding seal portion.
Claims (1)
同軸になるように設けられ、かつ前記棒電極の先端に向
かって漏斗状に絞り込まれた外筒ノズルを有し、前記棒
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の製造方法において
、電極支持筒となる金属棒に棒電極となる電極材が挿入
される挿入孔を開けた後該挿入孔に電極材を挿入する工
程と、電極材封入用蓋を前記挿入孔に当てた後大気中又
は真空中で該蓋と金属棒とをシール溶接し電極材を封入
する工程と、冷間等方圧加圧加工または高温等方圧加圧
加工により電極材と金属棒とを密着接合した後該金属棒
を機械加工して電極支持筒を製作する工程とを具備する
ことを特徴とするプラズマトーチの製造方法。A rod electrode is disposed in the center of the electrode support cylinder, and an outer cylinder nozzle is provided coaxially with the electrode support cylinder and narrowed into a funnel shape toward the tip of the rod electrode, and the In a method for manufacturing a plasma torch in which a plasma arc is generated between a rod electrode and a material to be cut to cut the material, an insertion hole into which an electrode material serving as a rod electrode is inserted into a metal rod serving as an electrode support tube. A step of inserting an electrode material into the insertion hole after opening the hole, and a step of applying a lid for enclosing the electrode material to the insertion hole, seal-welding the lid and the metal rod in the atmosphere or vacuum, and sealing the electrode material. and a step of closely joining the electrode material and the metal rod by cold isostatic pressing or high temperature isostatic pressing and then machining the metal rod to produce an electrode support tube. A method for manufacturing a plasma torch characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8263887A JPS63248538A (en) | 1987-04-03 | 1987-04-03 | Manufacture of plasma torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8263887A JPS63248538A (en) | 1987-04-03 | 1987-04-03 | Manufacture of plasma torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63248538A true JPS63248538A (en) | 1988-10-14 |
Family
ID=13779971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8263887A Pending JPS63248538A (en) | 1987-04-03 | 1987-04-03 | Manufacture of plasma torch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63248538A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003051399A (en) * | 2001-05-31 | 2003-02-21 | Esab Group Inc | Semi-fabricated item of electrode for plasma arc torch |
-
1987
- 1987-04-03 JP JP8263887A patent/JPS63248538A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003051399A (en) * | 2001-05-31 | 2003-02-21 | Esab Group Inc | Semi-fabricated item of electrode for plasma arc torch |
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