JP3349815B2 - Vacuum arc descaling method - Google Patents
Vacuum arc descaling methodInfo
- Publication number
- JP3349815B2 JP3349815B2 JP02066394A JP2066394A JP3349815B2 JP 3349815 B2 JP3349815 B2 JP 3349815B2 JP 02066394 A JP02066394 A JP 02066394A JP 2066394 A JP2066394 A JP 2066394A JP 3349815 B2 JP3349815 B2 JP 3349815B2
- Authority
- JP
- Japan
- Prior art keywords
- vacuum arc
- arc
- cathode
- descaling
- vacuum
- 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 - Lifetime
Links
Landscapes
- Cleaning In General (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- ing And Chemical Polishing (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は真空アークを用いて金属
表面のスケールを除去する真空アークデスケール方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum arc descaling method for removing scale from a metal surface using a vacuum arc.
【０００２】[0002]
【従来の技術】真空アークを用いて金属表面のスケール
を除去する真空アークデスケール方法においては、被処
理材を陰極とし、被処理材と向かい合う真空アーク電極
を陽極とし、被処理材と真空アーク電極間で真空アーク
を点弧する。この際、陰極となる被処理材上の陰極点が
スケールを求めて動き回り、スケールが優先的に蒸発除
去される。例えば特開平４−１１００８４号公報では真
空度、電極形状、給電方法を制御することにより、デス
ケール処理を行う方法が述べられているが、真空アーク
を点弧した後デスケール処理の終了を検知する手段はな
かった。2. Description of the Related Art In a vacuum arc descale method for removing scale from a metal surface using a vacuum arc, a material to be treated is used as a cathode, a vacuum arc electrode facing the material to be treated is used as an anode, and the material to be treated and the vacuum arc electrode are used. A vacuum arc is ignited between them. At this time, the cathode spot on the material to be processed serving as the cathode moves around in search of the scale, and the scale is preferentially removed by evaporation. For example, Japanese Patent Laid-Open No. 4-10084 discloses a method of performing a descaling process by controlling a degree of vacuum, an electrode shape, and a power supply method. However, means for detecting the end of the descaling process after firing a vacuum arc. There was no.
【０００３】[0003]
【発明が解決しようとする課題】本発明は真空アークデ
スケール処理の終了を検知して、消費電力を節約する真
空アークデスケール方法を提供する。SUMMARY OF THE INVENTION The present invention provides a vacuum arc descaling method that detects the end of a vacuum arc descaling process and saves power consumption.
【０００４】[0004]
【課題を解決するための手段】本発明は被処理材に真空
アークを放電して、金属の表面を処理する真空アークデ
スケール方法において、正極に接続された陽極電極と被
処理材からなる陰極電極との間にアーク電位測定回路を
形成し、アーク電圧の上昇によりデスケール処理の終了
を検知することを特徴とする真空アークデスケール方法
である。SUMMARY OF THE INVENTION The present invention relates to a vacuum arc descaling method for treating a metal surface by discharging a vacuum arc to a material to be treated, and comprising a cathode electrode comprising an anode electrode connected to a positive electrode and a material to be treated. And an arc potential measuring circuit is formed between them, and the end of the descaling process is detected by an increase in the arc voltage.
【０００５】[0005]
【作用】真空アークを点弧する際、電極に直流電源から
の電流を供給する電流回路があり、電流は直流電源から
供給され、電極を経て真空アークに供給される。さらに
電流は真空アークから陰極（被処理材）上の陰極点によ
り回収され、直流電源に帰る。又真空アーク放電での陰
極点の移動機構は、陰極点から蒸発する蒸気が陰極点か
ら放出される電子によりイオン化される。このイオンが
陰極表面に入射することにより陰極表面を加熱し溶融池
を形成し新たな陰極点を形成する。新たな陰極点は加熱
により溶融池を拡大し成長する。成長した陰極点では電
流密度が低下し加熱が不十分になり最終的には消滅す
る。このプロセスにより個々の陰極点は発生・成長・消
滅を繰り返す。When a vacuum arc is ignited, there is a current circuit for supplying a current from a DC power supply to the electrodes. The current is supplied from the DC power supply and is supplied to the vacuum arc via the electrodes. Further, current is collected from the vacuum arc by the cathode spot on the cathode (material to be processed) and returned to the DC power supply. In the mechanism for moving the cathode spot in vacuum arc discharge, vapor evaporating from the cathode spot is ionized by electrons emitted from the cathode spot. The ions are incident on the cathode surface to heat the cathode surface to form a molten pool and form a new cathode spot. The new cathode spot expands and grows the weld pool by heating. At the grown cathode spot, the current density decreases, heating becomes insufficient, and eventually disappears. By this process, individual cathode spots repeatedly generate, grow and disappear.
【０００６】このサイクルが連続化してアーク電位が求
められるが、デスケール処理を終わって、求めるスケー
ルがなくなると陰極点は被処理材の母材メタル上を動き
回ることとなる。そこでスケール上の陰極点と母材メタ
ル上の陰極点のそれぞれのアーク電位ではデスケール終
了時に電位（Ｖ）上昇による臨界点を示すことが認識さ
れた。従ってデスケール処理の終了を検知して作業基準
とすることができる。[0006] This cycle is continued to determine the arc potential. However, when the descaling process is completed and there is no more scale to be determined, the cathode spot moves around on the base metal of the material to be processed. Therefore, it has been recognized that the respective arc potentials of the cathode spot on the scale and the cathode spot on the base metal indicate a critical point due to an increase in potential (V) at the end of descale. Therefore, the end of the descaling process can be detected and used as a work reference.
【０００７】[0007]
（実施例１）図１は本発明の概念説明図である。図にお
いて１０：陽極電極（アノード）、１１：陰極電極（被
処理材）、１２：スケール、１３：直流電源、１４：電
圧計である。ステンレス銅ＳＵＳ４３０熱延鋼板の真空
アークデスケール処理を行った時のダイヤグラムを図２
に示す。この時の真空アーク放電は次の通りである。 電極距離：１０mm 電流 ：１００Ａ 圧力 ：２×１０-2Torr 温度 ：室温 図２に明らかなようにデスケール処理の終了時にアーク
電圧上昇の臨界点がみられる。(Embodiment 1) FIG. 1 is a conceptual explanatory view of the present invention. In the figure, 10 is an anode electrode (anode), 11 is a cathode electrode (material to be processed), 12 is a scale, 13 is a DC power supply, and 14 is a voltmeter. FIG. 2 shows a diagram of a vacuum arc descale treatment of a hot rolled stainless steel SUS430 steel sheet.
Shown in The vacuum arc discharge at this time is as follows. Electrode distance: 10 mm Current: 100 A Pressure: 2 × 10 -2 Torr Temperature: room temperature As is clear from FIG. 2, a critical point of arc voltage rise is observed at the end of the descaling process.
【０００８】（実施例２）実施例１の真空アークデスケ
ール処理に用いて、ステンレス鋼ＳＵＳ４３０熱延板の
真空アークデスケーリングを行った時のダイヤグラムを
図３に示す。Example 2 FIG. 3 shows a diagram when vacuum arc descaling of a stainless steel SUS430 hot rolled sheet is used in the vacuum arc descaling process of Example 1.
【０００９】この時の真空アーク放電は次の通りであ
る。The vacuum arc discharge at this time is as follows.
【００１０】電極距離：５５mm 電流 ：４００Ａ 圧力 ：２×１０-2Torr 温度 ：室温 図３で明らかな通りデスケール処理の終了時にアーク電
圧上昇の臨界点がみられる。Electrode distance: 55 mm Current: 400 A Pressure: 2 × 10 -2 Torr Temperature: room temperature As is clear from FIG. 3, a critical point of the arc voltage rise is observed at the end of the descaling process.
【００１１】以上本発明を単体の陽極電極の例について
述べたが、被処理材の幅方向に複数の分割陽極電極を配
設し、搬送方向に多段に分割電極を設けるときも、各電
極のアーク電圧を検知することによって、本発明の臨界
点を知ることができる。Although the present invention has been described with reference to an example of a single anode electrode, even when a plurality of divided anode electrodes are arranged in the width direction of the material to be processed and the divided electrodes are provided in multiple stages in the transport direction, each of the divided anode electrodes can be used. The critical point of the present invention can be known by detecting the arc voltage.
【００１２】[0012]
【発明の効果】本発明は真空アークの放電下のアーク電
圧でアークデスケール処理の終了を検知できるので、オ
ーバーデスケールを防止し、品質向上、高効率化、停止
の自動化を図れる。According to the present invention, the end of the arc descaling process can be detected by the arc voltage under the discharge of the vacuum arc, so that overdescaling can be prevented, and the quality can be improved, the efficiency can be improved, and the stop can be automated.
【図１】本発明の概念説明図。FIG. 1 is a conceptual explanatory diagram of the present invention.
【図２】本発明の実施例のダイヤグラム。FIG. 2 is a diagram of an embodiment of the present invention.
【図３】本発明の他の実施例のダイヤグラム。FIG. 3 is a diagram of another embodiment of the present invention.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−110084（ＪＰ，Ａ) 特開 平５−269517（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) B21B 45/06 B08B 7/00 C23F 4/02 C23G 5/00 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-110084 (JP, A) JP-A-5-269517 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) B21B 45/06 B08B 7/00 C23F 4/02 C23G 5/00
Claims (1)
の表面を処理する真空アークデスケール方法において、
正極に接続された陽極電極と被処理材からなる陰極電極
との間にアーク電位測定回路を形成し、アーク電圧の上
昇によりデスケール処理の終了を検知することを特徴と
する真空アークデスケール方法。1. A vacuum arc descaling method for treating a metal surface by discharging a vacuum arc on a material to be treated,
A vacuum arc descale method comprising forming an arc potential measurement circuit between an anode electrode connected to a positive electrode and a cathode electrode made of a material to be processed, and detecting the end of the descaling process by an increase in the arc voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02066394A JP3349815B2 (en) | 1994-02-17 | 1994-02-17 | Vacuum arc descaling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02066394A JP3349815B2 (en) | 1994-02-17 | 1994-02-17 | Vacuum arc descaling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07227615A JPH07227615A (en) | 1995-08-29 |
| JP3349815B2 true JP3349815B2 (en) | 2002-11-25 |
Family
ID=12033448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP02066394A Expired - Lifetime JP3349815B2 (en) | 1994-02-17 | 1994-02-17 | Vacuum arc descaling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3349815B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2509824C1 (en) * | 2012-07-24 | 2014-03-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В.И. Ульянова (Ленина)" | Surface processing by arc discharge in vacuum |
| CN103116177B (en) * | 2013-02-06 | 2015-11-18 | 北京邦鑫伟业技术开发有限公司 | proportional counter cleaning device and cleaning method |
| RU2724106C1 (en) * | 2019-03-22 | 2020-06-22 | Федеральное государственное бюджетное учреждение наук Институт проблем машиноведения Российской академии наук (ИПМаш РАН) | Metal surfaces decontamination method |
-
1994
- 1994-02-17 JP JP02066394A patent/JP3349815B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07227615A (en) | 1995-08-29 |
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