JPS63192568A - Plasma torch - Google Patents
Plasma torchInfo
- Publication number
- JPS63192568A JPS63192568A JP62024790A JP2479087A JPS63192568A JP S63192568 A JPS63192568 A JP S63192568A JP 62024790 A JP62024790 A JP 62024790A JP 2479087 A JP2479087 A JP 2479087A JP S63192568 A JPS63192568 A JP S63192568A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- plasma
- nozzle
- supporting cylinder
- tip
- 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
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000007772 electrode material Substances 0.000 claims description 13
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000000498 cooling water Substances 0.000 description 14
- 239000007789 gas Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 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
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002826 coolant Substances 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
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 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
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、プラズマトーチに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to plasma torches.
［従来の技術］
第３図及び第４図は、従来のプラズマトーチの構成・作
用を示す説明図である。図中１は、先端部を漏斗状に絞
り込んだノズルである。ノズル１内には、絶縁体で作ら
れた作動ガス旋回周兼内筒固定環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・ぐイブ５及び冷却水排出・ぐ
イブ６が接続されている。前記電極支持筒３は、通電／
？イゾ７の先端部に取付けられている。前記電極支持筒
３内には、電極冷却水導管８の先端部が挿入されている
。前記電極支持筒３の先端部には、タングステン、ハフ
ニウム、ジルコニウム等カラなる棒電極９が形成されて
いる。前記ノズル１と通電ノぐイア°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と作動ガス旋回量兼内筒固定環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１４ａを介□ してパイロット
アーク電源１５に接続されている。[Prior Art] FIGS. 3 and 4 are explanatory diagrams showing the structure and operation of a conventional plasma torch. In the figure, 1 is a nozzle with a funnel-shaped tip. Inside the nozzle 1, an electrode support cylinder 3 is provided via a working gas swirling ring/inner cylinder fixing ring 2 made of an insulator. An outer cylinder 4 is connected. A cooling water supply pipe 5 and a cooling water discharge pipe 6 are connected to the water-cooled outer cylinder 4. The electrode support tube 3 is energized/
? It is attached to the tip of Iso 7. The tip of an 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 . A connecting pipe 10 made of an electrical insulator is provided between the nozzle 1 and the current-carrying nozzle 7. A working gas supply pipe 11 is connected to a portion of the nozzle 1 between the connecting pipe 10 and the working gas swirl amount/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 14a.
前記通電バイア°２は、電線１４ｂｆ介してプラズマ電
源１６に接続され、電線１４ｂ、１４ｃｆ介してノヤイ
ロットアーク電源１５に接続されている。The current-carrying via °2 is connected to a plasma power source 16 via an electric wire 14bf, and to a pilot arc power source 15 via electric wires 14b and 14cf.
前記プラズマ電源１６は、電線１４ｄを介して被切断材
１７に接続されている。而して、電極支持筒３と被切断
材１７との間で、プラズマアーク１８、パイロットプラ
ズマ１８ａ及びプラズマアーク（又はアーク）１８ｂｆ
発生するようになっている。なお、第３図及び第４図中
矢印（→）は、冷却水の流れ方向を示し、斜線矢印（→
）ハ、作動ガスの流れ方向を示している。The plasma power source 16 is connected to the material to be cut 17 via an electric wire 14d. Thus, between the electrode support cylinder 3 and the material to be cut 17, a plasma arc 18, a pilot plasma 18a, and a plasma arc (or arc) 18bf are generated.
It's starting to happen. Note that the arrows (→) in FIGS. 3 and 4 indicate the flow direction of cooling water, and the diagonal arrow (→)
) Indicates the flow direction of the working gas.
而して、プラズマアークを発生させる前に１ず冷却水を
ノズル冷却水供給ノｊイブ５及び電極冷却水供給パイプ
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・ぐイブ１ノからアルゴン、水素、酸素、
空気及びそれ等の混合ガス等の作動ガスを作動ガス供給
ツクイブ１ノからトーチ内に入れ、ノズル１の先端から
放出する。Before generating a plasma arc, first, coolant is introduced into the plasma torch from the nozzle cooling water supply nozzle 5 and the electrode cooling water supply pipe 12, and the nozzle 1, electrode support tube (chip) 3, and rod are heated. Cooling of the electrode 9 is started. next,
Working gas supply: Argon, hydrogen, oxygen,
A working gas such as air and a mixture thereof is introduced into the torch from a working gas supply tube 1 and is discharged from the tip of the nozzle 1.
この時作動ガスは、作動ガス旋回層兼内筒固定環２によ
り旋回流となり、ノズル先端に供給される。At this time, the working gas becomes a swirling flow due to the working gas swirling layer/inner cylinder fixed ring 2, and is supplied to the nozzle tip.
次にＡ？イロットアーク電源１５を作動させ、第３図に
示す如く、棒電極９とノズル１との間に小電流の７４イ
ロツトアークを発生させる。このパイロットアークによ
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１８
ｈとしてノズル１０から下方へ伸びて行く。このノ９イ
ロットプラズマ１８ａが被切断材１７に接触した後、パ
イロットアーク電源１５金切り、同時にプラズマ電源１
６を作動させ、アーク１８ｂｆ棒電極９と被切断材１７
との間に移行させて大電流（１００〜２５０Ａ）′ｆｔ
流す。これによりプラズマアーク１８が発生し、被切断
材１７を切断する。Next A? The pilot arc power supply 15 is activated to generate a small current 74 pilot arc between the rod electrode 9 and the nozzle 1, as shown in FIG. Due to the heat generated by this pilot arc, the working gas supplied to the tip of the nozzle 1 becomes a swirling plasma flow, and the pilot plasma 18
It extends downward from the nozzle 10 as h. After this No. 9 pilot plasma 18a comes into contact with the material to be cut 17, the pilot arc power source 15 is cut, and at the same time, the plasma power source 1
6, the arc 18bf rod electrode 9 and the material to be cut 17
A large current (100-250A)'ft is transferred between
Flow. This generates a plasma arc 18 and cuts the material 17 to be cut.
［発明が解決しようとする問題点］
しかしながら、従来のプラズマトーチによれば、電極棒
９の径が小さいため、消耗がはげしく耐用時間が短かい
。したがって、工場での切断作業でに、ｄ極交換頻度が
高く作業能率が悪いとともに、消耗品としての電極コス
トが非常に高いものになっていた。[Problems to be Solved by the Invention] However, according to the conventional plasma torch, the diameter of the electrode rod 9 is small, so that wear is rapid and the service life is short. Therefore, during cutting work at a factory, the d-electrode has to be replaced frequently, resulting in poor work efficiency, and the cost of the electrode as a consumable item is extremely high.
第５図にプラズマ電極の損傷過程を示す。新しい電極支
持筒３は同図（Ｂ）の状態の場合、プラズマアーク１８
は電極棒９の表面から発生し、電極棒９は次第に井戸型
に消耗していく（同図（Ｂ）の状態）。Figure 5 shows the damage process to the plasma electrode. When the new electrode support tube 3 is in the state shown in the same figure (B), the plasma arc 18
is generated from the surface of the electrode rod 9, and the electrode rod 9 gradually wears out in the shape of a well (the state shown in FIG. 3B).
ところが、消耗深さＤがある値ＤＣ（臨界消耗深さ）に
達すると、突然プラズマアーク１８は電極支持筒３に移
行し、瞬間的に電極支持筒３およびノズル１を破損する
（同図（Ｃ）の状態）七けの歌唾呼。However, when the wear depth D reaches a certain value DC (critical wear depth), the plasma arc 18 suddenly moves to the electrode support tube 3 and instantly damages the electrode support tube 3 and the nozzle 1 (see Fig. Condition C) Seven songs spitting.
即ち、この臨界消耗深さり。が深ければ電極寿命は伸び
ることになる。In other words, this critical wear depth. The deeper the electrode, the longer the electrode life.
本発明は上記事情に鑑みてなされたもので、電極寿命を
長くして作業能率を向上するとともに電極コスト全大幅
に低減しえるプラズマトーチ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 plasma torch that can extend the life of the electrode, improve work efficiency, and significantly reduce the total cost of the electrode.
［問題点を解決するための手段と作用］発明者らは、試
験研究の結果、臨界消耗深さＤｃと電極材の径ψの関係
を調査し第２図に示す結果を得た。すなわち、臨界消耗
深さＤｃは電極材の径ψの増加により増加するが、電極
材の径ψが２，０ｍｍ以下と２．５ ｓｍ以上では、Ｄ
ｏの増加率が大きく異なることが明らかとなった。[Means and effects for solving the problems] As a result of testing and research, the inventors investigated the relationship between the critical wear depth Dc and the diameter ψ of the electrode material, and obtained the results shown in FIG. That is, the critical wear depth Dc increases as the diameter ψ of the electrode material increases, but when the diameter ψ of the electrode material is 2.0 mm or less and 2.5 sm or more, D
It became clear that the rate of increase in o was significantly different.
即ち、本発明は電極支持筒の中心部に電極材を配し、該
電極支持筒と同軸になるように設けられ、かつ、前記電
極材の先端に向って漏斗状に絞シ込まれた外筒ノズルを
有し、前記電極材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、前記電極材の直径が２．０闇以上であることを要旨
とする。That is, in the present invention, an electrode material is disposed in the center of an electrode support tube, and an outer portion is provided coaxially with the electrode support tube and is squeezed into a funnel shape toward the tip of the electrode material. In a plasma torch that has a cylindrical nozzle and cuts the material by generating a plasma arc between the electrode material and the material to be cut, the diameter of the electrode material is 2.0 mm or more. shall be.
本発明によれば、従来と比べ電極寿命を長くして作業能
率を向上するとともに電極コストを大幅に低減できる。According to the present invention, it is possible to extend the life of the electrode, improve work efficiency, and significantly reduce the cost of the electrode compared to the conventional method.
［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.
但し、本発明に係るプラズマトーチの概略構成は、電極
棒９′ｊｔ除いた以外は第３図及び第４図と同様なため
、説明を省略する。However, since the schematic structure of the plasma torch according to the present invention is the same as that in FIGS. 3 and 4 except for the electrode rod 9'jt, the explanation will be omitted.
本発明に係る電極棒９は、その径（９）） ’ｋ ２．
Ｏ■以上となっている。このことは第１図より決定し
たものである。即ち、同図より、プラズマ電極（電極支
持筒３）の寿命は電極棒９の径の増加により増加してい
るが、寿命増加率は電極棒９の径ψは電極支持筒３の径
により決まることが明らかでろ−６＝
る。本発明者等の試験では３゜５ｍｋ越える径のものに
ついては試験できなかったが、プラズマトーチ全体の寸
法を大きくし、電極支持筒３の寸法を大きくすれば電極
棒９の寸法も大きくでき、寿命も長くなると予想される
。The electrode rod 9 according to the present invention has a diameter (9)'k2.
It is O■ or more. This was determined from FIG. That is, from the figure, the life of the plasma electrode (electrode support tube 3) increases as the diameter of the electrode rod 9 increases, but the rate of increase in life is determined by the diameter ψ of the electrode rod 9 and the diameter of the electrode support tube 3. It is clear that −6= ru. In the tests conducted by the present inventors, it was not possible to test a diameter exceeding 3.5 mK, but by increasing the overall dimensions of the plasma torch and increasing the dimensions of the electrode support cylinder 3, the dimensions of the electrode rod 9 can also be increased. It is also expected that their lifespan will be longer.
本発明によれば、電極支持筒３の中心部に電極棒９を配
設するとともに、前記電極支持筒３と同軸となるように
前記電極棒９に向って漏斗状に絞り込まれたノズル１を
設け、かつ前記電極棒９の直径ｆ ２．０ ｌ１１１以
上とした構造となっているため、従来と比べ電極寿命を
長くし、もって作業能率の向上を図るとともに電極コス
トヲ大幅に低減することができる。According to the present invention, the electrode rod 9 is disposed in the center of the electrode support tube 3, and the nozzle 1 is narrowed in a funnel shape toward the electrode rod 9 so as to be coaxial with the electrode support tube 3. Since the electrode rod 9 has a structure in which the diameter of the electrode rod 9 is f2.0 l111 or more, the life of the electrode can be extended compared to the conventional one, thereby improving work efficiency and significantly reducing the cost of the electrode. .
［発明の効果］
以上詳述した如く本発明によれば、従来と比べ電極寿命
を長くして作業能率を向上するとともに電極コストを大
幅に低減し得るプラズマトーチを提供できる。[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a plasma torch that has a longer electrode life than conventional torches, improves work efficiency, and can significantly reduce electrode costs.
第１図は電極材の径と電極寿命との関係を示す特性図、
第２図は電極材の径と臨界消耗深さとの関係を示す特性
図、第３図及び第４図は夫々プラズマトーチの説明図、
第５図はプラズマトーチの作用の説明図である。
１・・・ノズル、２・・・作動ガス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・ぞイブ、７・・
・通電パイプ、８・・・電極冷却水導管、９・・・棒電
極、１０・・・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
却水排出ノＪ？イブ、１４ａ。
１４ ｂ ｓ １４ ｃ 、１４ ｄ・・・電線、１５
・・・パイロットアーク電源、１６・・・プラズマ電源
、１７・・・被切断材、１８・・・プラズマアーク。
出願人代理人 弁理士 鈴 江 武 彦手続補正書
６２，１１．１９
昭和 年 月 日
特許庁長官 小 川 邦 夫 殿
１、事件の表示
特願昭６２−２４７９０号
２、発明の名称
プラズマトーチ
３、補正をする者
事件との関係 特許出願人
（８２０） 三菱重工業株式会社 （ほか１名）４、
代理人
東京都千代田区霞が関３丁目７番２号 ＵＢＥビル〒１
００ 電話 ０３ （５０２）３１８１ （大代表）
７、補正の内容
（１）明細書節３頁６行目において「矢印（−）」とあ
るを、「斜線矢印（−＃−）Ｊと訂正する。
（２）明細書箱３頁７行目において［斜線矢印（→）と
あるを、「矢印（→）」と訂正する。Figure 1 is a characteristic diagram showing the relationship between the diameter of the electrode material and the life of the electrode.
Fig. 2 is a characteristic diagram showing the relationship between the diameter of the electrode material and the critical wear depth, Figs. 3 and 4 are explanatory diagrams of the plasma torch, respectively;
FIG. 5 is an explanatory diagram of the action of the plasma torch. DESCRIPTION OF SYMBOLS 1... Nozzle, 2... Working gas rotation circumference and inner cylinder fixed ring, 3... Electrode support cylinder, 4... Water cooling outer cylinder, 5... Cooling water supply pipe, 6... Cooling Water discharge, 7...
・Electricity pipe, 8... Electrode cooling water conduit, 9... Rod electrode, 10... Connecting pipe, 11... Working gas supply pipe, 12... Electrode cooling water supply pipe, 13... Electrode cooling water discharge? Eve, 14a. 14 b s 14 c, 14 d... electric wire, 15
... Pilot arc power supply, 16 ... Plasma power supply, 17 ... Material to be cut, 18 ... Plasma arc. Applicant's representative Patent attorney Takehiko Suzue Procedural amendment No. 62, November 19 Showa Year Month Date Director of the Patent Office Kunio Ogawa 1, Indication of case Patent application No. 1982-24790 2, Name of invention Plasma torch 3 , Relationship with the person making the amendment Patent applicant (820) Mitsubishi Heavy Industries, Ltd. (and 1 other person) 4.
Agent: UBE Building, 3-7-2 Kasumigaseki, Chiyoda-ku, Tokyo
00 Telephone 03 (502) 3181 (main representative)
7. Contents of the amendment (1) In the specification section, page 3, line 6, "arrow (-)" is corrected to "diagonal arrow (-#-) J." (2) Specification box, page 3, line 7 [Correct the diagonal arrow (→) to "arrow (→)."
Claims (1)
軸になるように設けられ、かつ、前記電極材の先端に向
って漏斗状に絞り込まれた外筒ノズルを有し、前記電極
材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、前記電極材
の直径が２．０ｍｍ以上であることを特徴とするプラズ
マトーチ。An electrode material is disposed in the center of the electrode support tube, and an outer tube nozzle is disposed coaxially with the electrode support tube and narrowed into a funnel shape toward the tip of the electrode material, A plasma torch that cuts a material by generating a plasma arc between an electrode material and a material to be cut, wherein the electrode material has a diameter of 2.0 mm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62024790A JPS63192568A (en) | 1987-02-06 | 1987-02-06 | Plasma torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62024790A JPS63192568A (en) | 1987-02-06 | 1987-02-06 | Plasma torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63192568A true JPS63192568A (en) | 1988-08-09 |
Family
ID=12147981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62024790A Pending JPS63192568A (en) | 1987-02-06 | 1987-02-06 | Plasma torch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63192568A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105171213A (en) * | 2015-10-26 | 2015-12-23 | 常州市海宝焊割有限公司 | Plasma cutting gun |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5258036A (en) * | 1975-11-04 | 1977-05-13 | Vni Pk I Chiefunorogiichiesuki | Plasma arc torch |
-
1987
- 1987-02-06 JP JP62024790A patent/JPS63192568A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5258036A (en) * | 1975-11-04 | 1977-05-13 | Vni Pk I Chiefunorogiichiesuki | Plasma arc torch |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105171213A (en) * | 2015-10-26 | 2015-12-23 | 常州市海宝焊割有限公司 | Plasma cutting gun |
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