JP6916574B1 - Oxygen arc fusing rod - Google Patents

Oxygen arc fusing rod Download PDF

Info

Publication number
JP6916574B1
JP6916574B1 JP2021081864A JP2021081864A JP6916574B1 JP 6916574 B1 JP6916574 B1 JP 6916574B1 JP 2021081864 A JP2021081864 A JP 2021081864A JP 2021081864 A JP2021081864 A JP 2021081864A JP 6916574 B1 JP6916574 B1 JP 6916574B1
Authority
JP
Japan
Prior art keywords
oxygen
fusing rod
fusing
arc
main body
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.)
Active
Application number
JP2021081864A
Other languages
Japanese (ja)
Other versions
JP2022175472A (en
Inventor
健一 原
健一 原
明彦 坂井
明彦 坂井
Original Assignee
酸素アーク工業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 酸素アーク工業株式会社 filed Critical 酸素アーク工業株式会社
Priority to JP2021081864A priority Critical patent/JP6916574B1/en
Application granted granted Critical
Publication of JP6916574B1 publication Critical patent/JP6916574B1/en
Publication of JP2022175472A publication Critical patent/JP2022175472A/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/10Nuclear fusion reactors

Landscapes

  • Arc Welding In General (AREA)

Abstract

【課題】溶断棒本体として厚肉の筒体を使用し助燃材を使用しない酸素アーク溶断棒の溶断性能を向上させる。【解決手段】軸芯部に酸素流通孔12を有する長尺円筒状で金属製の溶断棒本体11を備える酸素アーク溶断棒10Aにおいて、溶断棒本体11の肉厚Tに対する酸素流通孔12の直径Dの比であるD/Tを1以下とし、溶断棒本体11の基端側の端部に、先細り状でテーパ角度θが70°以上90°以下のテーパ面13を形成した。【選択図】図2PROBLEM TO BE SOLVED: To improve the fusing performance of an oxygen arc fusing rod which uses a thick cylinder as a fusing rod main body and does not use a combustion improver. SOLUTION: In an oxygen arc fusing rod 10A provided with a long cylindrical metal fusing rod main body 11 having an oxygen flow hole 12 in a shaft core portion, the diameter of the oxygen flow hole 12 with respect to the wall thickness T of the fusing rod main body 11. The D / T ratio of D was set to 1 or less, and a tapered surface 13 having a tapered shape and a taper angle θ of 70 ° or more and 90 ° or less was formed at the end portion of the fusing rod main body 11 on the base end side. [Selection diagram] Fig. 2

Description

本発明は、酸素アーク溶断法に使用する酸素アーク溶断棒に関する。 The present invention relates to an oxygen arc fusing rod used in the oxygen arc fusing method.

ガス切断や機械的切断では困難を伴う対象材(板厚の厚い鋼材など)を切断あるいは穿孔する方法として、酸素アーク溶断法が知られている。酸素アーク溶断法では、酸素アーク溶断棒の先端と対象材との間にアークを発生させそのアーク熱によって酸素アーク溶断棒(溶断棒本体)の先端部を溶融し、溶断棒本体の内孔(酸素流通孔)から送り込まれる酸素によって溶断棒本体の先端部が連続的に酸化反応を起こす。その際の酸化反応熱によって対象材を切断あるいは穿孔する。 The oxygen arc fusing method is known as a method for cutting or drilling a target material (thick steel material or the like) that is difficult to cut by gas or mechanical cutting. In the oxygen arc fusing method, an arc is generated between the tip of the oxygen arc fusing rod and the target material, and the tip of the oxygen arc fusing rod (fusing rod body) is melted by the arc heat, and the inner hole of the fusing rod body (the inner hole of the fusing rod body) ( The tip of the fusing rod body continuously undergoes an oxidation reaction due to the oxygen sent from the oxygen flow hole). The target material is cut or perforated by the heat of oxidation reaction at that time.

従来一般的に酸素アーク溶断棒においては、溶断棒本体として外径に対し比較的薄肉の筒体が使用され、この筒体の内部に助燃材として数本から数十本の線材又は異形鋼を挿入することで、連続的に酸化反応(自己燃焼)を安定させる工夫がなされている。また、本願発明者らは、特許文献1において線材の基端側の端部を円錐状に加工するなどして酸素気流への抵抗を軽減させ、溶断性能の向上を図る技術を提案している。 Conventionally, in an oxygen arc fusing rod, a cylinder having a relatively thin thickness with respect to the outer diameter is generally used as the fusing rod body, and several to several tens of wires or deformed steel are used as a combustion improver inside the cylinder. By inserting it, a device is made to continuously stabilize the oxidation reaction (self-combustion). Further, the inventors of the present application have proposed a technique in Patent Document 1 for improving the fusing performance by reducing the resistance to the oxygen air flow by processing the end portion of the wire rod on the base end side into a conical shape. ..

このように薄肉の筒体の内部に助燃材を備える酸素アーク溶断棒は、当然、酸素との反応面が多くなり燃焼しやすいという利点を有する一方、溶断棒の消耗が早い、熱源となる金属量(鉄量)が少なく熱カロリーが小さい等の欠点を有する。そこで、熱カロリー(鉄量)を増やし燃焼速度(消耗速度)を抑える観点から、溶断棒本体として厚肉の筒体を使用し、助燃材を使用しない酸素アーク溶断棒が用いられることがある。しかし、このように溶断棒本体として厚肉の筒体を使用すると、鉄量が多くなる一方で、溶断棒本体の内孔(酸素流通孔)が小さくなるため、鉄量と酸素流量のバランスが悪くなり、十分な溶断性能が得られないことがあった。 An oxygen arc fusing rod provided with a combustion improver inside a thin-walled cylinder naturally has an advantage that it has a large number of reaction surfaces with oxygen and is easy to burn, but the fusing rod is quickly consumed and is a metal that becomes a heat source. It has drawbacks such as a small amount (iron amount) and a small amount of heat calories. Therefore, from the viewpoint of increasing the heat calorie (iron amount) and suppressing the combustion speed (consumption rate), an oxygen arc fusing rod that uses a thick cylinder as the fusing rod main body and does not use a combustion improver may be used. However, when a thick cylinder is used as the fusing rod body in this way, the iron amount increases, while the inner hole (oxygen flow hole) of the fusing rod body becomes smaller, so that the balance between the iron amount and the oxygen flow rate is balanced. In some cases, it became worse and sufficient fusing performance could not be obtained.

特許第6527628号公報Japanese Patent No. 6527628

本発明が解決しようとする課題は、溶断棒本体として厚肉の筒体を使用し助燃材を使用しない酸素アーク溶断棒の溶断性能を向上させることにある。 An object to be solved by the present invention is to improve the fusing performance of an oxygen arc fusing rod that uses a thick cylinder as the fusing rod main body and does not use a combustion improver.

本発明者らは、溶断棒本体として厚肉の筒体を使用し助燃材を使用しない酸素アーク溶断棒において溶断性能を向上させるには、ホルダから溶断棒本体の基端側の端部に供給される酸素気流を、いかに安定性・集中性・推進性を維持・向上させて溶断棒本体の先端に届けられる構造とするかが肝要であると考え、特に溶断棒本体の基端側の端部の構造に着目してその構造について検討及び試験を重ねた。その結果、溶断棒本体の肉厚Tに対する酸素流通孔の直径Dの比であるD/Tを1以下としたうえで、溶断棒本体の基端側の端部に、先細り状でテーパ角度が70°以上90°以下のテーパ面を形成することで、溶断性能が格段に向上することがわかった。 In order to improve the fusing performance in an oxygen arc fusing rod that uses a thick cylinder as the fusing rod main body and does not use a combustion improver, the present inventors supply the fusing rod body from the holder to the end portion on the base end side of the fusing rod main body. It is important to maintain and improve the stability, concentration, and propulsion of the oxygen flow to be delivered to the tip of the fusing rod body, and in particular, the end on the base end side of the fusing rod body. Focusing on the structure of the part, the structure was examined and tested repeatedly. As a result, the D / T, which is the ratio of the diameter D of the oxygen flow holes to the wall thickness T of the fusing rod body, is set to 1 or less, and the end portion on the base end side of the fusing rod body has a tapered shape and a taper angle. It was found that the fusing performance was significantly improved by forming a tapered surface of 70 ° or more and 90 ° or less.

すなわち、本発明の一観点によれば、次の酸素アーク溶断棒が提供される。
軸芯部に酸素流通孔を有する長尺円筒状で金属製の溶断棒本体を備える酸素アーク溶断棒であって、
溶断棒本体の肉厚をT、酸素流通孔の直径をDとしたとき、D/Tが1以下であり、
溶断棒本体の基端側の端部に、先細り状でテーパ角度が70°以上90°以下のテーパ面が形成されている、酸素アーク溶断棒。
That is, according to one aspect of the present invention, the following oxygen arc fusing rod is provided.
An oxygen arc fusing rod having a long cylindrical metal fusing rod body having an oxygen flow hole in the shaft core.
When the wall thickness of the fusing rod body is T and the diameter of the oxygen flow hole is D, the D / T is 1 or less.
An oxygen arc fusing rod in which a tapered surface having a tapered shape and a taper angle of 70 ° or more and 90 ° or less is formed at the end portion of the fusing rod body on the base end side.

本発明によれば、溶断棒本体として厚肉の筒体を使用し助燃材を使用しない酸素アーク溶断棒において、溶断棒本体の基端側の端部に供給される酸素気流の安定性・集中性・推進性を維持・向上させて溶断棒本体の先端に届けることができる。そのため、酸素アーク溶断棒の溶断性能を向上させることができる。 According to the present invention, in an oxygen arc fusing rod that uses a thick cylinder as the fusing rod main body and does not use a combustion improver, the stability and concentration of the oxygen air flow supplied to the end portion on the base end side of the fusing rod main body. It is possible to maintain and improve the property and propulsion and deliver it to the tip of the fusing rod body. Therefore, the fusing performance of the oxygen arc fusing rod can be improved.

酸素アーク溶断棒の使用方法を示す概念図。The conceptual diagram which shows the usage of the oxygen arc fusing rod. 本発明の一実施形態である酸素アーク溶断棒の基端側を示し、(a)は斜視図、(b)は断面図。The base end side of the oxygen arc fusing rod according to the embodiment of the present invention is shown, (a) is a perspective view, and (b) is a cross-sectional view. 酸素アーク溶断試験結果を示す写真。A photograph showing the results of an oxygen arc fusing test.

まず、酸素アーク溶断棒の使用方法について説明する。図1に示すように、酸素アーク溶断棒10はその基端側をホルダ20に保持されて使用される。ホルダ20を介して酸素アーク溶断棒10と対象材50との間に交流又は直流電源30が印加され、酸素アーク溶断棒10の先端と対象材50との間にアークが発生する。また、酸素アーク溶断棒10には酸素ボンベ40からの酸素がホルダ20を介して供給され、内孔(酸素流通孔)を通じて酸素アーク溶断棒10の先端から酸素気流が対象材50に向けて吹き付けられる。これにより、対象材50がアーク加熱されつつ酸素気流の作用により切断あるいは穿孔される。 First, how to use the oxygen arc fusing rod will be described. As shown in FIG. 1, the oxygen arc fusing rod 10 is used with its base end side held by the holder 20. An AC or DC power supply 30 is applied between the oxygen arc fusing rod 10 and the target material 50 via the holder 20, and an arc is generated between the tip of the oxygen arc fusing rod 10 and the target material 50. Further, oxygen from the oxygen cylinder 40 is supplied to the oxygen arc fusing rod 10 via the holder 20, and an oxygen air stream is blown from the tip of the oxygen arc fusing rod 10 toward the target material 50 through the inner hole (oxygen flow hole). Be done. As a result, the target material 50 is cut or perforated by the action of the oxygen air flow while being arc-heated.

次に、本発明の一実施形態である酸素アーク溶断棒について説明する。図2には、本発明の一実施形態である酸素アーク溶断棒の基端側を示している。同図に示すように、酸素アーク溶断棒10Aは、長尺円筒状で金属製の溶断棒本体11を備え、溶断棒本体11の内部には助燃材を備えていない。溶断棒本体11はその軸芯部に、酸素が流通する酸素流通孔12を有する。また、溶断棒本体11の肉厚Tに対する酸素流通孔12の直径Dの比であるD/Tは1以下である。さらに、溶断棒本体11の基端側の端部には、先細り状のテーパ面13が形成されている。このテーパ面13のテーパ角度θは70°以上90°以下である。なお、図2には表れていないが、ホルダ20(図1参照)で保持される酸素アーク溶断棒10Aの基端側より先端側では、対象材50(図1参照)との間で安定したアークを発生させると共に対象材50以外との間でのアーク発生を防止するために、溶断棒本体11の外周をフラックス層で被覆している。 Next, an oxygen arc fusing rod according to an embodiment of the present invention will be described. FIG. 2 shows the proximal end side of the oxygen arc fusing rod according to the embodiment of the present invention. As shown in the figure, the oxygen arc fusing rod 10A includes a long cylindrical and metal fusing rod main body 11, and does not have a combustion improver inside the fusing rod main body 11. The fusing rod main body 11 has an oxygen flow hole 12 in the shaft core portion through which oxygen flows. Further, the D / T, which is the ratio of the diameter D of the oxygen flow hole 12 to the wall thickness T of the fusing rod main body 11, is 1 or less. Further, a tapered tapered surface 13 is formed at the end portion of the fusing rod main body 11 on the base end side. The taper angle θ of the tapered surface 13 is 70 ° or more and 90 ° or less. Although not shown in FIG. 2, the oxygen arc fusing rod 10A held by the holder 20 (see FIG. 1) was stable with the target material 50 (see FIG. 1) on the tip side from the proximal end side. The outer periphery of the fusing rod main body 11 is covered with a flux layer in order to generate an arc and prevent an arc from being generated with a material other than the target material 50.

このように、本発明の一実施形態である酸素アーク溶断棒10Aでは、溶断棒本体11の肉厚Tに対する酸素流通孔12の直径Dの比であるD/Tを1以下としたうえで、溶断棒本体11の基端側の端部に、先細り状でテーパ角度θが70°以上90°以下のテーパ面13を形成することで、ホルダ20(図1参照)から溶断棒本体11の基端側の端部に供給される酸素気流は、図2(a)に概念的に示すようにテーパ面13に沿って酸素流通孔12に収束するように進み、いわゆるコンバージェント型ノズルと同様の原理により加速される。すなわち、D/Tを1以下とし、かつテーパ面13のテーパ角度θを70°以上90°以下とすることで、溶断棒本体11の基端側の端部に供給される酸素気流が効率的に加速される。これにより、溶断棒本体11の基端側の端部に供給される酸素気流を、その安定性・集中性・推進性を維持・向上させて溶断棒本体11の先端に届けることができ、酸素アーク溶断棒10Aの溶断性能を向上させることができる。 As described above, in the oxygen arc fusing rod 10A according to the embodiment of the present invention, the D / T which is the ratio of the diameter D of the oxygen flow hole 12 to the wall thickness T of the fusing rod main body 11 is set to 1 or less. By forming a tapered surface 13 having a tapered shape and a taper angle θ of 70 ° or more and 90 ° or less at the end portion of the fusing rod main body 11 on the base end side, the base of the fusing rod main body 11 is formed from the holder 20 (see FIG. 1). The oxygen airflow supplied to the end portion on the end side proceeds so as to converge to the oxygen flow hole 12 along the tapered surface 13 as conceptually shown in FIG. 2 (a), which is similar to the so-called convergent type nozzle. Accelerated by principle. That is, by setting the D / T to 1 or less and the taper angle θ of the tapered surface 13 to 70 ° or more and 90 ° or less, the oxygen airflow supplied to the end portion on the base end side of the fusing rod main body 11 is efficient. Is accelerated to. As a result, the oxygen airflow supplied to the end portion of the fusing rod main body 11 on the base end side can be delivered to the tip of the fusing rod main body 11 while maintaining and improving its stability, concentration, and propulsion. The fusing performance of the arc fusing rod 10A can be improved.

ここで、溶断棒本体11の肉厚Tに対する酸素流通孔12の直径Dの比であるD/Tの下限値は特に限定されず技術常識に基づいて決定すればよいが、鉄量と酸素流量のバランスを考慮すると、D/Tは0.5以上とすることが好ましい。
なお、特許文献1に開示しているように、筒体(溶断棒本体)の内部に助燃材として芯体を有するタイプの酸素アーク溶断棒においてD/Tは5〜6程度であり、本発明の酸素アーク溶断棒とは溶断棒としてのタイプが明らかに異なる。また、特許文献1では、芯体に案内面を形成しているが、この案内面は酸素気流への抵抗を軽減させることを目的として形成されるものであり、本発明のように酸素気流を積極的に加速させて溶断棒本体11の先端まで届けようとするものではない。
Here, the lower limit of D / T, which is the ratio of the diameter D of the oxygen flow hole 12 to the wall thickness T of the fusing rod main body 11, is not particularly limited and may be determined based on common technical knowledge, but the amount of iron and the oxygen flow rate may be determined. The D / T is preferably 0.5 or more in consideration of the balance of.
As disclosed in Patent Document 1, a D / T of about 5 to 6 is about 5 to 6 in a type of oxygen arc fusing rod having a core body as a combustion improver inside a cylinder (fusing rod main body), and the present invention. The type as a fusing rod is clearly different from that of the oxygen arc fusing rod. Further, in Patent Document 1, a guide surface is formed on the core body, but this guide surface is formed for the purpose of reducing the resistance to the oxygen air flow, and the oxygen air flow is generated as in the present invention. It is not intended to actively accelerate and reach the tip of the fusing rod body 11.

以下の実施例1及び比較例1の酸素アーク溶断棒を用いてテストピース(材質:SS材、厚み:25mm、幅:150mm、長さ:500mm)の酸素アーク溶断試験(酸素二次圧:0.5MPa、電流:170A)を実施した。
<実施例1>
図1の酸素アーク溶断棒10において、溶断棒本体11の肉厚T=2.5mm、酸素流通孔12の直径D=2.3mm、D/T=0.9、テーパ面13のテーパ角度θ=90°、溶断棒本体11の全長=500mmとした酸素アーク溶断棒。
<比較例1>
実施例1の酸素アーク溶断棒においてテーパ面13を形成していない酸素アーク溶断棒。
Oxygen arc fusing test (secondary oxygen pressure: 0) of a test piece (material: SS material, thickness: 25 mm, width: 150 mm, length: 500 mm) using the oxygen arc fusing rods of Example 1 and Comparative Example 1 below. .5 MPa, current: 170 A) was carried out.
<Example 1>
In the oxygen arc fusing rod 10 of FIG. 1, the wall thickness T of the fusing rod main body 11 is 2.5 mm, the diameter of the oxygen flow hole 12 is D = 2.3 mm, D / T = 0.9, and the taper angle θ of the tapered surface 13 is θ. Oxygen arc fusing rod with = 90 ° and total length of the fusing rod body 11 = 500 mm.
<Comparative example 1>
An oxygen arc fusing rod in which the tapered surface 13 is not formed in the oxygen arc fusing rod of Example 1.

図3に、試験結果を示している。図3において、Aは実施例1の酸素アーク溶断棒で切断したテストピース、A1は試験前の実施例1の酸素アーク溶断棒、A2は試験後の実施例1の酸素アーク溶断棒、Bは比較例1の酸素アーク溶断棒で切断したテストピース、B1は試験前の比較例1の酸素アーク溶断棒、B2は試験後の比較例1の酸素アーク溶断棒を示している。 FIG. 3 shows the test results. In FIG. 3, A is a test piece cut with an oxygen arc fusing rod of Example 1, A1 is an oxygen arc fusing rod of Example 1 before the test, A2 is an oxygen arc fusing rod of Example 1 after the test, and B is. A test piece cut with an oxygen arc fusing rod of Comparative Example 1, B1 shows an oxygen arc fusing rod of Comparative Example 1 before the test, and B2 shows an oxygen arc fusing rod of Comparative Example 1 after the test.

図3からもわかるように、実施例1の酸素アーク溶断棒でテストピースを切断するのに要した長さは195mm、比較例1の酸素アーク溶断棒でテストピースを切断するのに要した長さは325mmであった。すなわち、実施例1の酸素アーク溶断棒の溶断効率は、比較例1の酸素アーク溶断棒に比べて約1.7倍となった。また、実施例1の酸素アーク溶断棒でテストピースを切断するのに要した時間は58秒、比較例1の酸素アーク溶断棒でテストピースを切断するのに要した時間は119秒であった。すなわち、実施例1の酸素アーク溶断棒の溶断速度は、比較例1の酸素アーク溶断棒の約2倍となった。以上の通り、溶断棒本体の基端側の端部に、所定のテーパ面13を形成することで、溶断性能が格段に向上することが確認された。 As can be seen from FIG. 3, the length required to cut the test piece with the oxygen arc fusing rod of Example 1 is 195 mm, and the length required to cut the test piece with the oxygen arc fusing rod of Comparative Example 1 is 195 mm. The length was 325 mm. That is, the fusing efficiency of the oxygen arc fusing rod of Example 1 was about 1.7 times that of the oxygen arc fusing rod of Comparative Example 1. The time required to cut the test piece with the oxygen arc fusing rod of Example 1 was 58 seconds, and the time required to cut the test piece with the oxygen arc fusing rod of Comparative Example 1 was 119 seconds. .. That is, the fusing speed of the oxygen arc fusing rod of Example 1 was about twice that of the oxygen arc fusing rod of Comparative Example 1. As described above, it was confirmed that the fusing performance is remarkably improved by forming the predetermined tapered surface 13 at the end portion of the fusing rod main body on the base end side.

10,10A 酸素アーク溶断棒
11 溶断棒本体
12 酸素流通孔
13 テーパ面
20 ホルダ
30 交流又は直流電源
40 酸素ボンベ
50 対象材
10,10A Oxygen arc fusing rod 11 Fusing rod body 12 Oxygen flow hole 13 Tapered surface 20 Holder 30 AC or DC power supply 40 Oxygen cylinder 50 Target material

Claims (1)

軸芯部に酸素流通孔を有する長尺円筒状で金属製の溶断棒本体を備える酸素アーク溶断棒であって、
溶断棒本体の肉厚をT、酸素流通孔の直径をDとしたとき、D/Tが1以下であり、
溶断棒本体の基端側の端部に、先細り状でテーパ角度が70°以上90°以下のテーパ面が形成されている、酸素アーク溶断棒。
An oxygen arc fusing rod having a long cylindrical metal fusing rod body having an oxygen flow hole in the shaft core.
When the wall thickness of the fusing rod body is T and the diameter of the oxygen flow hole is D, the D / T is 1 or less.
An oxygen arc fusing rod in which a tapered surface having a tapered shape and a taper angle of 70 ° or more and 90 ° or less is formed at the end portion of the fusing rod body on the base end side.
JP2021081864A 2021-05-13 2021-05-13 Oxygen arc fusing rod Active JP6916574B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2021081864A JP6916574B1 (en) 2021-05-13 2021-05-13 Oxygen arc fusing rod

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2021081864A JP6916574B1 (en) 2021-05-13 2021-05-13 Oxygen arc fusing rod

Publications (2)

Publication Number Publication Date
JP6916574B1 true JP6916574B1 (en) 2021-08-11
JP2022175472A JP2022175472A (en) 2022-11-25

Family

ID=77172645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2021081864A Active JP6916574B1 (en) 2021-05-13 2021-05-13 Oxygen arc fusing rod

Country Status (1)

Country Link
JP (1) JP6916574B1 (en)

Also Published As

Publication number Publication date
JP2022175472A (en) 2022-11-25

Similar Documents

Publication Publication Date Title
US4788402A (en) High power extended arc plasma spray method and apparatus
JP2002521798A (en) Electrode with improved insert structure for plasma arc torch
WO2007018265A1 (en) Method of consumable electrode type gas shield arc welding and welding torch for use therein
JP5120131B2 (en) Multi-electrode submerged arc welding method
JPH0399780A (en) Method of gas metal arc welding of aluminum base work
JP6916574B1 (en) Oxygen arc fusing rod
JP6348059B2 (en) First electrode welding torch for multi-electrode submerged arc welding and welding method using the same
US6583378B1 (en) Plasma machining electrode and plasma machining device
JPWO2011099637A1 (en) TIG arc welding electrode and TIG arc welding method
EP3053418A1 (en) Plasma torch electrode materials and related systems and methods
JP2007222942A (en) TITANIUM LASER CUTTING WITH Ar/He GAS MIXTURE
Srinivasan et al. Effect of surface tension metal transfer on fume formation rate during flux-cored arc welding of HSLA steel
US3716902A (en) Method of making a composite welding torch tip
KR20060027394A (en) The contact tip and nozzle by the arc control system for the spatter reduction system and high speed welding for fcaw and gmae
JP4489041B2 (en) Electromagnetic accelerator
Ribeiro et al. Metal transfer mechanisms in hot-wire gas metal arc welding
JP2020049522A (en) Lance pipe for oxygen fusion
US3838820A (en) Welding and cutting torch tips
JP2021126681A (en) Gas shield welding method and welding torch
JP2007136446A (en) Plasma spray device and its electrode
Nurminen et al. Hot-wire cladding process studies
US2444778A (en) Apparatus for welding tubing
Jia et al. Process control of pulsed laser enhanced metal transfer behavior in CO2 gas shielded welding
WO2017154916A1 (en) Production method for molten-aluminum-plated copper wire
JP2005281763A (en) Method for forming corrosion resistant laminated structure film and corrosion resistant laminated structure film

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210525

A871 Explanation of circumstances concerning accelerated examination

Free format text: JAPANESE INTERMEDIATE CODE: A871

Effective date: 20210525

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20210706

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20210709

R150 Certificate of patent or registration of utility model

Ref document number: 6916574

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250