JPS61245969A - Piercing method - Google Patents

Piercing method

Info

Publication number
JPS61245969A
JPS61245969A JP8716985A JP8716985A JPS61245969A JP S61245969 A JPS61245969 A JP S61245969A JP 8716985 A JP8716985 A JP 8716985A JP 8716985 A JP8716985 A JP 8716985A JP S61245969 A JPS61245969 A JP S61245969A
Authority
JP
Japan
Prior art keywords
rod
steel plate
torch
preheating
reaction
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
Application number
JP8716985A
Other languages
Japanese (ja)
Inventor
Masakazu Uenishi
上西 正和
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP8716985A priority Critical patent/JPS61245969A/en
Publication of JPS61245969A publication Critical patent/JPS61245969A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To shorten the piercing time by preheating simultaneously with a torch a steel plate and the iron made reaction promoting rod held thereon in the piercing method to pierce on a steel plate by a gas cutter. CONSTITUTION:A reaction accelerating rod C (the iron wire of about 3mmphi) is held on a steel plate A with the space of about 5mm and the plate A and rod C are simultaneously heated by the preheating flame of the torch B of a gas cutter. The rod C is immediately melted exceeding the ignition state then and when an oxygen jet is passed from the torch B simultaneously with abutting the rod C to plate A at that time, a through hole is produced. With this method the point reaching the preheating temp. becomes extremely small and the reaction is accelerated in the plate width direction with feeding of oxygen and the through hole can be formed in extremely short time.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はガス切断器を用いて鋼板に穿孔するピアシング
方法に係る。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of piercing a steel plate using a gas cutter.

〔従来の技術〕[Conventional technology]

従来、鋼板Aに穴を開ける場合、ガス切断器のトーチB
を使用し、第5図のようにまずある範囲をガス炎Eで予
熱りし、酸化温度に達したあと、第6図のように酸素噴
流Fをそこに当て、切断器を動かしながら酸化反応を進
め穴を穿つていた。
Conventionally, when drilling a hole in steel plate A, torch B of a gas cutter was used.
First, as shown in Figure 5, a certain area is preheated with gas flame E, and after reaching the oxidation temperature, an oxygen jet F is applied there as shown in Figure 6, and the oxidation reaction is started while moving the cutter. I proceeded to drill a hole.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

このため従来の方法は、予熱した後、ガス切断器を動か
しながら除々に穴を穿って行く技価の必要な作業となる
ため、時間がかかる上、誰でもが容易に作業できる方法
ではなかった。
For this reason, the conventional method required a lot of skill to drill holes gradually while moving the gas cutter after preheating, which was time-consuming and not an easy method for anyone to perform. .

〔問題点を解決するための手段〕[Means for solving problems]

本発明は上記のような従来の方法の問題点を解決するた
めに提案するもので、鋼板上に鉄製の反応促進棒を保持
して該鋼板と該促進俸とをトーチで同時に予熱し、該促
進棒が溶融したときに該促進棒を該鋼板に当接すると同
時にトーチから酸素を噴射して該鋼板に穿孔することを
特徴とするピアシング方法である。
The present invention is proposed to solve the problems of the conventional methods as described above, and involves holding an iron reaction accelerator rod on a steel plate, preheating the steel plate and the accelerator at the same time with a torch, and This piercing method is characterized in that when the accelerator rod is melted, the accelerator rod is brought into contact with the steel plate and, at the same time, oxygen is injected from a torch to perforate the steel plate.

〔作 用〕[For production]

ガス切断の原理は次のとおりである。 The principle of gas cutting is as follows.

謂の一部を予熱炎で熱し燃焼温度(酸化温度)に達した
時、酸素を吹きつけると激しい燃焼作用を起こし、その
部分の鉄の原子が酸化鉄となって溶け、酸素の噴流によ
り酸化鉄(スラグ)が吹き飛ばされ切断が出来る。この
化学反応は次のとおり。
When a part of the part is heated with a preheating flame and reaches the combustion temperature (oxidation temperature), oxygen is blown onto it, causing a violent combustion effect, and the iron atoms in that part become iron oxide, melt, and are oxidized by the jet of oxygen. The iron (slag) is blown away and can be cut. This chemical reaction is as follows.

Fe+ (1/2)O” = FeO+ 64Kca1
2Fe + (a/2)(C= Fezes + 19
0.7Kca13Fe +  20z  = Fex0
4+ 266.9Kcal上記は代表的な反応式であり
、実際にはこれらの反応が混在する。
Fe+ (1/2)O” = FeO+ 64Kca1
2Fe + (a/2) (C= Fezes + 19
0.7Kca13Fe + 20z = Fex0
4+ 266.9Kcal The above reaction formula is a typical reaction formula, and in reality, these reactions are mixed.

切断スラグ中には上記の酸化物が混在している。The above oxides are mixed in the cutting slag.

また切断の初期にはFeOの割合が最も多く、この融点
は1380℃でFeの融点1535℃よりはるかに低い
。そのため鋼が溶融せずに酸化物のみが吹き飛ばされる
のできれいな切断面が得られる。
Further, at the initial stage of cutting, the proportion of FeO is the highest, and its melting point is 1380°C, which is much lower than the melting point of Fe, 1535°C. Therefore, only the oxide is blown away without melting the steel, resulting in a clean cut surface.

また、上記に示す如くこの反応は発熱反応であシ、いっ
たん酸化がはじまると反応が連続する。
Further, as shown above, this reaction is an exothermic reaction, and once oxidation has started, the reaction continues.

即ち酸化しつつあるFeは酸化反応を進めるための触媒
的働きをする。
That is, the oxidizing Fe acts as a catalyst to advance the oxidation reaction.

ガス切断作業では酸化反応により発生した熱量は大部分
スラグに含まれ、これが吹き飛ばされるので入Mを補充
しなければならない。一方、穴開は作業では穴が貫通す
る迄スラグが吹き飛ばされないので発熱反応が続く。前
述の如〈従来の穴開は方法では先づ鋼板を予熱する作業
が必要であり、この作業を行なうために従来のガス切断
器を使用すると酸化開始温度までに鋼板を加熱した場合
、加熱範囲が約30 m/′mOと拡がりそこへ酸素噴
流を通すとスラグが表面にあふプ←咄=←佛−」情す→
ため切断器を動かし表面へスラグをうまく送り出しなが
ら穴を穿っていかなければならない。常に鋼の面を酸素
にさらさないと酸化は進まない。従って最初に予熱温度
に達した点を極小にし、酸素を供給すると板厚方向に反
応が進み、極〈短時間に貫通穴が出来る。促進棒を使う
本発明の方法は上記のような理論に基づくものである。
In gas cutting operations, most of the heat generated by the oxidation reaction is contained in the slag, and since this is blown off, the input M must be replenished. On the other hand, during drilling, the exothermic reaction continues because the slag is not blown away until the hole is penetrated. As mentioned above, in the conventional method of drilling holes, it is necessary to preheat the steel plate first, and if a conventional gas cutter is used to perform this work, if the steel plate is heated to the oxidation starting temperature, the heating range will be limited. spreads to about 30 m/'mO, and when an oxygen jet is passed through it, slag bubbles up on the surface.
Therefore, the hole must be drilled while moving the cutter to properly feed the slag to the surface. Oxidation will not progress unless the steel surface is constantly exposed to oxygen. Therefore, if the point at which the preheating temperature is first reached is minimized and oxygen is supplied, the reaction proceeds in the thickness direction of the plate, forming a through hole in an extremely short time. The method of the present invention using a promoting rod is based on the above theory.

〔実施例〕〔Example〕

第1図のように、鋼板A上に約5W位空間を持って、反
応促進棒B(3mg1程度の鉄線)を保持し、鋼板と棒
を同時に予熱炎で熱すると、すぐに棒が赤熱状態をこえ
溶融するので、その時に棒を鋼板に当てると同時にトー
チCから酸素噴流を流すと貫通孔が出来る。
As shown in Fig. 1, reaction promoting rod B (iron wire of about 3 mg 1) is held above steel plate A with a space of about 5 W, and when the steel plate and the rod are heated at the same time with a preheating flame, the rod immediately becomes red hot. At that time, when the rod is applied to the steel plate and at the same time an oxygen jet is flowed from torch C, a through hole is created.

第2.3及び4図において、1架台、2切断トーチ、3
トーチホルダー、4反応促進棒(鉄線)、5促進棒ガイ
ド、6促進棒送り出しローラー、7促進棒送りハンドル
、8パルプマニホールド、9酸素ホース9.10燃焼ガ
スホース、11高圧酸素ガス流量調整弁、12低圧酸素
流量調整弁、13燃焼ガス流量調整弁、14高圧酸素ス
イツチパルプである。この装置で14を開とし11によ
り最適酸素噴流量が得られる様に調整し14を閉とする
。14はワンタッチで全開・全閉の出来るパルプである
。鋼板上の穴を開ける位置に2の中心が来る様装置を設
置する。次に12.13を調整し、点火して適正な予熱
炎を作る。ここで7を操作し4の先端が鋼板面より約5
簡離れるぐらいに動かし、予熱炎により4の先端が加熱
され溶融しはじめた時に7を操作し4を送シ出し鋼板面
に接したと同時に14を開とし酸素噴流を出す。これに
より瞬時に穴明けが完了する。4の位置はぐり出して鋼
板面に接した位置で2の中心線に一致する位置に来る様
に調整し取り付けておく。なお、促進棒の送シ出し機構
をここでは手まわし式としたが、モータ一式にしてもよ
い。また、1の台は固定式としたが、モーター等を組み
込み移動式にしても良い。ここの固吹 定式という意弗は自走しないということで、人力で移動
する方式である。
In Figures 2.3 and 4, 1 cradle, 2 cutting torches, 3
Torch holder, 4 reaction accelerating rod (iron wire), 5 accelerating rod guide, 6 accelerating rod delivery roller, 7 accelerating rod feeding handle, 8 pulp manifold, 9 oxygen hose 9.10 combustion gas hose, 11 high pressure oxygen gas flow rate adjustment valve, 12 These are a low pressure oxygen flow rate adjustment valve, 13 combustion gas flow rate adjustment valve, and 14 high pressure oxygen switch pulp. In this device, 14 is opened, 11 is adjusted to obtain the optimum oxygen jet amount, and 14 is closed. 14 is a pulp that can be fully opened and closed with one touch. Install the device so that the center of 2 is at the location where the hole will be drilled on the steel plate. Next, adjust 12.13 and ignite to create a proper preheating flame. Now, operate 7 so that the tip of 4 is about 5 points from the steel plate surface.
Move it until it separates easily, and when the tip of 4 is heated by the preheating flame and begins to melt, operate 7 to send 4 out, and at the same time it touches the steel plate surface, open 14 to emit an oxygen jet. This completes the drilling instantly. Adjust and install it so that it protrudes from position 4 and matches the center line of 2 at the position where it contacts the steel plate surface. Note that although the mechanism for feeding the promotion rod is of a hand-crank type here, it may be a complete motor. Further, although the first stand is fixed, it may be made movable by incorporating a motor or the like. The fixed blowing type here means that it does not move by itself, but is moved by human power.

〔発明の効果〕〔Effect of the invention〕

+11  ピアシングに際し従来のように切断器を手で
動かしてスラグを送り出す操作が必要なくなる。
+11 When piercing, it is no longer necessary to move the cutter by hand to send out the slag as in the past.

(2)  切断器は穴位置に合わせて静止し、促進棒は
機械的に送り出して穿孔すれば良いから特に技価を要せ
ず誰でも容易に作業できるようになる。
(2) The cutter remains stationary according to the hole position, and the accelerator rod is mechanically sent out to punch the hole, so anyone can easily perform the work without requiring special skill.

(3)  促進棒をトーチに近すけて熱するから促進俸
の溶融が速く、これを鋼板面に当てて鋼板面の発熱、酸
化反応を促進させるから穿孔は瞬時に完了し、穿孔作業
を短時間で行なえるようになる。
(3) Because the accelerator rod is heated close to the torch, the accelerator melts quickly, and when it is applied to the steel plate surface, it promotes heat generation and oxidation reaction on the steel plate surface, so the drilling is completed instantly and the drilling work is shortened. You can do it in time.

【図面の簡単な説明】[Brief explanation of drawings]

第1図及び第2図は本発明の各実施例を示す説明図、第
3図及び第4図は第2図の側面図及び平面図、第5図及
び第6図は従来の方法の予熱状態及び穿孔状態を示す説
明図である。 A・・・鋼板、B・・・トーチ、C・・・促進棒。 第3図 r)lワ刷L
Figures 1 and 2 are explanatory views showing each embodiment of the present invention, Figures 3 and 4 are side views and plan views of Figure 2, and Figures 5 and 6 are preheating methods according to the conventional method. It is an explanatory view showing a state and a perforation state. A... Steel plate, B... Torch, C... Promotion rod. Figure 3 r) lwa printing L

Claims (1)

【特許請求の範囲】[Claims] 鋼板上に鉄製の反応促進棒を保持して該鋼板と該促進棒
とをトーチで同時に予熱し、該促進棒が溶融したときに
該促進棒を該鋼板に当接すると同時にトーチから酸素を
噴射して該鋼板に穿孔することを特徴とするピアシング
方法。
Holding an iron reaction promoting rod on a steel plate, preheating the steel plate and the promoting rod at the same time with a torch, and when the promoting rod melts, contact the promoting rod with the steel plate and at the same time inject oxygen from the torch. A piercing method comprising: drilling a hole in the steel plate.
JP8716985A 1985-04-23 1985-04-23 Piercing method Pending JPS61245969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8716985A JPS61245969A (en) 1985-04-23 1985-04-23 Piercing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8716985A JPS61245969A (en) 1985-04-23 1985-04-23 Piercing method

Publications (1)

Publication Number Publication Date
JPS61245969A true JPS61245969A (en) 1986-11-01

Family

ID=13907484

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8716985A Pending JPS61245969A (en) 1985-04-23 1985-04-23 Piercing method

Country Status (1)

Country Link
JP (1) JPS61245969A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030037867A (en) * 2001-11-06 2003-05-16 신원정밀공업 주식회사 Boring method on the iron board
CN116000407A (en) * 2023-03-22 2023-04-25 哈尔滨电机厂有限责任公司 Device and method for perforating arc starting hole of super-thick plate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030037867A (en) * 2001-11-06 2003-05-16 신원정밀공업 주식회사 Boring method on the iron board
CN116000407A (en) * 2023-03-22 2023-04-25 哈尔滨电机厂有限责任公司 Device and method for perforating arc starting hole of super-thick plate

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