JPH01245972A - Portable air plasma cutting machine - Google Patents
Portable air plasma cutting machineInfo
- Publication number
- JPH01245972A JPH01245972A JP7411288A JP7411288A JPH01245972A JP H01245972 A JPH01245972 A JP H01245972A JP 7411288 A JP7411288 A JP 7411288A JP 7411288 A JP7411288 A JP 7411288A JP H01245972 A JPH01245972 A JP H01245972A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- cutting machine
- torch
- plasma cutting
- circuit
- 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.)
- Granted
Links
- 238000005520 cutting process Methods 0.000 title claims abstract description 27
- 239000002184 metal Substances 0.000 claims abstract description 13
- 230000001965 increasing effect Effects 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000009499 grossing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000003079 width control Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 101100033673 Mus musculus Ren1 gene Proteins 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高圧直流によるアークと圧縮空気とによるプラ
ズマ状高温高速流により金属を切断するエアープラズマ
切断機に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air plasma cutting machine that cuts metal using a plasma-like high-temperature, high-speed flow of compressed air and an arc generated by high-pressure direct current.
従来のこの種のエアープラズマ切断機としては第３図の
構成図に例示するものが知られている。As a conventional air plasma cutting machine of this type, one illustrated in the configuration diagram of FIG. 3 is known.
第３図において１はインバータを含む高圧直流発生回路
、２はエアーコンプレッサ、３は切断用のトーチ、４は
被切断金属板、５は母材ケーブル、６は交流電源用のブ
レーカである。第３図に示す如く高圧直流発生回路ｌに
よる高圧直流は該回路ｌと母材ケーブル５により接続さ
れた被切断金属板４と前記トーチ３の電極との間にアー
クを発生させ、該トーチ３のギャップより噴出するコン
プレッサ２からの圧縮空気をプラズマ状の高温高速流と
なして前記金属板４の切断を行なうものである。In FIG. 3, 1 is a high-voltage direct current generation circuit including an inverter, 2 is an air compressor, 3 is a cutting torch, 4 is a metal plate to be cut, 5 is a base material cable, and 6 is a breaker for an AC power source. As shown in FIG. 3, the high-voltage DC generated by the high-voltage DC generating circuit 1 generates an arc between the circuit 1 and the metal plate 4 to be cut, which is connected by the base material cable 5, and the electrode of the torch 3. The metal plate 4 is cut by converting compressed air from the compressor 2 into a plasma-like high-temperature, high-velocity flow.
しかしながら上記従来技術においては第３図に示す如く
エアーコンプレッサ等の圧縮空気源とインバータを含む
高圧直流発生回路とは互いに別置され、エアープラズマ
切断機としては上記の如くそれぞれ別置された諸機器に
より構成され、このため切断作業の場所が限定され切断
対象のある場所如何によっては極めて不便であった。こ
れに鑑み本発明は前記の不便さを解消する小形軽量の携
帯用エアープラズマ切断機の提供を目的とするものであ
る。However, in the above conventional technology, as shown in Fig. 3, a compressed air source such as an air compressor and a high-voltage DC generation circuit including an inverter are placed separately from each other, and as an air plasma cutting machine, various devices are placed separately as described above. Therefore, the location of the cutting operation is limited, which is extremely inconvenient depending on the location of the object to be cut. In view of this, it is an object of the present invention to provide a small and lightweight portable air plasma cutting machine that eliminates the above-mentioned inconvenience.
エアープラズマ切断機におけるインバータのキャリア周
波数の高周波化により高圧直流発生回路の交流通電素子
の小形軽量化を計るものである。By increasing the carrier frequency of the inverter in an air plasma cutting machine, it is possible to reduce the size and weight of the AC current-carrying element in the high-voltage DC generation circuit.
すなわちインバータを介して作成した高圧直流により切
断用トーチにおいて発生させたアークにより該トーチよ
り噴出する圧縮空気を高温高速のプラズマ状となして被
切断金属に当て該金属を切断するエアープラズマ切断機
において、前記インバータの変換動作用キャリア周波数
の増大による該インバータの出力周波数の高周波化を計
り、該インバータをその交流通電素子を主たる対象とし
て小形軽量化し、前記圧縮空気発生用のコンプレッサと
前記インバータを含む高圧直流発生回路とを一体収納し
てその携帯を可能としたことを特徴とするものである。In other words, in an air plasma cutting machine that uses an arc generated in a cutting torch by a high-pressure direct current created via an inverter, the compressed air ejected from the torch is turned into high-temperature, high-speed plasma and is applied to the metal to be cut to cut the metal. , the output frequency of the inverter is increased by increasing the carrier frequency for conversion operation of the inverter, the inverter is made smaller and lighter mainly by its AC current-carrying elements, and the inverter includes the compressor for generating compressed air and the inverter. The device is characterized in that it is integrated with a high-voltage direct current generation circuit, making it portable.
エアープラズマ切断機の体積及び重量構成において直流
高電圧を発生する電気関係素子の占める割合は大である
。また一般に調整可能な直流高電圧を得るためにはイン
バータにより制御された交流電圧を変圧後整流する方法
が最も有効であり、更に前記インバータの直流／交流変
換動作におけるキャリア周波数の増大によるその出力周
波数の高周波化を計れば前記インバータの交流通電素子
であるリアクトル或いは変圧器等の相対的に大形且つ重
量物素子の小形化が可能となる。本発明は前記の如くし
て小形軽量化したインバータとエアーコンプレッサとを
一体収納して前記切断機の携帯化を可能にするものであ
る。Electrical components that generate high DC voltage account for a large proportion of the volume and weight of an air plasma cutting machine. Generally, in order to obtain an adjustable high DC voltage, the most effective method is to transform and then rectify the AC voltage controlled by an inverter.Furthermore, the output frequency is increased by increasing the carrier frequency in the DC/AC conversion operation of the inverter. By increasing the frequency of the inverter, it becomes possible to downsize relatively large and heavy elements such as reactors or transformers that are AC current-carrying elements of the inverter. The present invention enables the cutting machine to be made portable by integrally housing the inverter and air compressor, which have been reduced in size and weight as described above.
〔実施例） 以下この発明の実施例を図面により説明する。〔Example) Embodiments of the present invention will be described below with reference to the drawings.
第１図はこの発明の実施例を示す構成図であり、携帯用
エアープラズマ切断機１５における高圧直流発生回路ｌ
とエアーコンプレッサ２とエアーフィルタ２ａと冷却フ
ァン２ｂとの一体収納状態の概略を示す。なお前記回路
１の電気品については第２図の説明において言及する。FIG. 1 is a block diagram showing an embodiment of the present invention, and shows a high voltage DC generation circuit l in a portable air plasma cutting machine 15.
This schematically shows how the air compressor 2, air filter 2a, and cooling fan 2b are housed together. Note that the electrical components of the circuit 1 will be referred to in the explanation of FIG.
第２図は前記高圧直流発生回路１の回路図を示す。第２
図において７は整流回路であり交流電源用のブレーカ６
を経由して入力される交流電圧を整流し直流を出力する
。ＣＩは平滑用コンデンサ、８はインバータであり例え
ばＭＯＳＦＥＴ等の高周波用パワートランジスタＴ、〜
Ｔ４と出力コンデンサＣ２と出力変圧器ＴＲＩ等から成
る。９は該インバータ８の制御回路であり、トーチスイ
ッチによる前記切断機の起動指令を受は起動シーケンス
を演算するロジック回路９ａと、トーチ電流の設定器１
ｏと検出用変流器ＣＴ２とからの両信号を入力とする電
流調整回路９ｂと、該調整回路の出力信号を入力とし前
記インバータ８のパワートランジスタＴ Ｉ”’ Ｔ
ａのキャリア周波数によるスイッチングモードを規定す
るパルス巾制御回路９ｃと、該パルス巾制御回路の出力
増巾を行ない前記各トランジスタＴ、〜Ｔ４へのベース
信号を出力するベース駆動回路９ｄと、前記平滑用コン
デンサＣ１の両端直流電圧を受は前記各回路の制御用直
流電圧を供給するＤ Ｃ／Ｄ Ｃコンバータ９ｅと保護
回路９ｆとから成る。ＬＲは限流抵抗、ＣＴ ｔは前記
保護回路９ｆに対し前記インバータ８の電流信号を検出
する変流器である。１１は前記出力変圧器Ｔ Ｒｔの単
相交流出力を受は直流に変換する単相全波の整流回路で
あり、ダイオードＤ、〜Ｄ４とりアクドルＬｌ−Ｌａ
とから成るｅＬｓは平滑リアクトル、ＣＴ、はトーチ電
流検出用変流器、１２はトーチのアーク始動用高圧発生
回路、ＴＲ２は該高圧発生回路の出力電圧誘導用の変圧
器、１３は前記トーチアークの円滑始動用のクリーニン
グ回路であり抵抗とコンデンサとの直並列回路から成る
。FIG. 2 shows a circuit diagram of the high voltage DC generating circuit 1. As shown in FIG. Second
In the figure, 7 is a rectifier circuit and a breaker 6 for AC power supply.
It rectifies the AC voltage input through the converter and outputs DC. CI is a smoothing capacitor, 8 is an inverter, and high-frequency power transistors T, such as MOSFETs, etc.
It consists of T4, output capacitor C2, output transformer TRI, etc. Reference numeral 9 designates a control circuit for the inverter 8, which includes a logic circuit 9a that receives a command to start the cutting machine from the torch switch and calculates a startup sequence, and a torch current setting device 1.
a current adjustment circuit 9b which receives both signals from O and the detection current transformer CT2 as input, and a power transistor T I"' T of the inverter 8 which receives the output signal of the adjustment circuit as input.
a pulse width control circuit 9c that defines a switching mode based on the carrier frequency of a, a base drive circuit 9d that amplifies the output of the pulse width control circuit and outputs a base signal to each of the transistors T, -T4; The DC/DC converter 9e receives the DC voltage across the capacitor C1 and supplies the DC voltage for control of each of the circuits, and a protection circuit 9f. LR is a current limiting resistor, and CTt is a current transformer that detects the current signal of the inverter 8 for the protection circuit 9f. Reference numeral 11 denotes a single-phase full-wave rectifier circuit that receives the single-phase AC output of the output transformer T Rt and converts it into DC.
eLs is a smoothing reactor, CT is a current transformer for detecting the torch current, 12 is a high voltage generation circuit for starting the arc of the torch, TR2 is a transformer for inducing the output voltage of the high voltage generation circuit, and 13 is the torch arc This is a cleaning circuit for smooth starting of the engine, and consists of a series-parallel circuit of a resistor and a capacitor.
本発明によれば、高圧直流発生回路におけるインバータ
のキャリア周波数を増大し該インバータの出力周波数の
高周波化による前記直流発生回路の大巾な小形軽量化を
計り、該直流発生回路と工ァーコンプレッサとを一体収
納してエアープラズマ切断機を携帯可能とし、金属切断
作業の場所的制約を大巾に軽減させることができる。According to the present invention, the carrier frequency of the inverter in the high-voltage DC generation circuit is increased and the output frequency of the inverter is made higher, thereby significantly reducing the size and weight of the DC generation circuit. The air plasma cutting machine can be housed in one piece, making it portable, and the space constraints for metal cutting work can be greatly reduced.
第１図はこの発明の実施例を示すエアープラズマ切断機
の構成図、第２図は高圧直流発生回路の回路図、第３図
は第１図に対応する従来技術の実施例である。
ｌ・・・高圧直流発生回路、２・・・エアーコンプレッ
サ、２ａ・・・エアーフィルタ、２ｂ・・・冷却ファン
、３・・・トーチ、４・・・被切断金属板、５・・・母
材ケーブル、６・・・ブレーカ、７・・・整流回路、８
・・・インバータ、９・・・制御回路、９ａ・・・ロジ
ック回路、９ｂ・・・電流調整回路、９ｃ・・・パルス
巾制御回路、９ｄ・・・ベース％ｌＫ動回路、９ｅ・・
・Ｄ Ｃ／Ｄ Ｃコンバータ、９ｆ・・・保護回路、１
０・・・設定器、１１・・・整流回路、１２・・・始動
用高圧発生回路、１３・・・クリーニング回路、１５・
・・携帯用エアープラズマ切断機、Ｃ。
・・・平滑用コンデンサ、Ｃ２・・・出力コンデンサ、
ＣＴ、、ＣＴ！・・・変流器、Ｄ Ｉ”’ Ｄ ａ・・
・グイオード、ＬＲ・・・限流抵抗、Ｌ、〜Ｌ、・・・
リアクトル、Ｔ１〜Ｔ４・・・パワートランジスタ、Ｔ
Ｒ，、ＴＲ１・・・変圧器。
第１図
手続補正書彷式）
昭和６３年 ７月 ５日
。ｙＦヮ、□ ウ 漣−
１、事件の表示 特願昭６３−７ψ／／２−３、補
正をする者
事件との関係 出願人
性 所 川崎市川崎区田辺新田１番１号名 称 （
６２３）富士電機株式会社
４、代 理 人FIG. 1 is a block diagram of an air plasma cutting machine showing an embodiment of the present invention, FIG. 2 is a circuit diagram of a high voltage direct current generating circuit, and FIG. 3 is an embodiment of a prior art corresponding to FIG. 1. l...High voltage DC generation circuit, 2...Air compressor, 2a...Air filter, 2b...Cooling fan, 3...Torch, 4...Metal plate to be cut, 5...Mother material cable, 6... breaker, 7... rectifier circuit, 8
... Inverter, 9... Control circuit, 9a... Logic circuit, 9b... Current adjustment circuit, 9c... Pulse width control circuit, 9d... Base %lK dynamic circuit, 9e...
・DC/DC converter, 9f...protection circuit, 1
0... Setting device, 11... Rectifier circuit, 12... High pressure generation circuit for starting, 13... Cleaning circuit, 15...
...Portable air plasma cutting machine, C. ...Smoothing capacitor, C2...Output capacitor,
CT, CT! ...Current transformer, D I"' D a...
・Guiode, LR...Current limiting resistor, L, ~L,...
Reactor, T1-T4...Power transistor, T
R,, TR1...Transformer. Figure 1 Procedural Amendment Form) July 5, 1986. yFヮ, □ U Ren- 1. Indication of the case Patent application 1986-7ψ//2-3, Relationship with the case of the person making the amendments Applicant Location 1-1 Tanabe Shinden, Kawasaki-ku, Kawasaki City Name (
623) Fuji Electric Co., Ltd. 4, Agent
Claims (1)
トーチにおいて発生させたアークにより該トーチより噴
出する圧縮空気を高温高速のプラズマ状となして被切断
金属に当て該金属を切断するエアープラズマ切断機にお
いて、前記インバータの変換動作用キャリア周波数の増
大による該インバータの出力周波数の高周波化を計り、
該インバータをその交流通電素子を主たる対象として小
形軽量化し、前記圧縮空気発生用のコンプレッサと前記
インバータを含む高圧直流発生回路とを一体収納してそ
の携帯を可能としたことを特徴とする携帯用エアープラ
ズマ切断機。1) An air plasma cutting machine that uses high-pressure direct current generated via an inverter to generate an arc in a cutting torch, and converts the compressed air ejected from the torch into high-temperature, high-speed plasma into a metal to be cut, thereby cutting the metal. In this step, the output frequency of the inverter is increased by increasing the carrier frequency for conversion operation of the inverter,
A portable device characterized in that the inverter is made smaller and lighter by focusing on its AC current-carrying elements, and the compressor for generating compressed air and the high-voltage DC generation circuit including the inverter are housed in one unit, thereby making it portable. Air plasma cutting machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63074112A JPH0638985B2 (en) | 1988-03-28 | 1988-03-28 | Portable air plasma cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63074112A JPH0638985B2 (en) | 1988-03-28 | 1988-03-28 | Portable air plasma cutting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01245972A true JPH01245972A (en) | 1989-10-02 |
| JPH0638985B2 JPH0638985B2 (en) | 1994-05-25 |
Family
ID=13537792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63074112A Expired - Lifetime JPH0638985B2 (en) | 1988-03-28 | 1988-03-28 | Portable air plasma cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638985B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02144276U (en) * | 1989-04-28 | 1990-12-06 | ||
| JP2005271019A (en) * | 2004-03-24 | 2005-10-06 | Matsushita Electric Ind Co Ltd | Arc welding robot |
| US7615719B2 (en) * | 2006-09-11 | 2009-11-10 | Hypertherm, Inc. | Autonomous plasma cutting system |
| US8350182B2 (en) | 2006-09-11 | 2013-01-08 | Hypertherm, Inc. | Portable autonomous material processing system |
| US9522438B2 (en) | 2012-11-09 | 2016-12-20 | Hypertherm, Inc. | Battery-controlled plasma arc torch system |
| US9550251B2 (en) | 2014-03-28 | 2017-01-24 | Hypertherm, Inc. | Power supply assembly for a plasma arc torch system |
| US9967964B2 (en) | 2014-05-30 | 2018-05-08 | Hypertherm, Inc. | Cooling plasma cutting system consumables and related systems and methods |
| US10736204B2 (en) | 2016-10-21 | 2020-08-04 | Hypertherm, Inc. | Plasma power tool |
| CN112475568A (en) * | 2020-10-28 | 2021-03-12 | 上海沪工焊接集团股份有限公司 | Arc guide control method and device for double-voltage plasma cutting machine |
| US11622440B2 (en) | 2014-05-30 | 2023-04-04 | Hypertherm, Inc. | Cooling plasma cutting system consumables and related systems and methods |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6028963U (en) * | 1983-07-30 | 1985-02-27 | 株式会社 三社電機製作所 | power supply |
| JPS6052072U (en) * | 1983-09-20 | 1985-04-12 | 日立精工株式会社 | Welding power supply |
| JPS61216861A (en) * | 1985-03-20 | 1986-09-26 | Osaka Denki Kk | Plasma arc cutting device |
| JPS61286068A (en) * | 1985-06-12 | 1986-12-16 | Hitachi Seiko Ltd | Power source for arc welding |
| JPS62292273A (en) * | 1986-06-13 | 1987-12-18 | Hitachi Seiko Ltd | Power source for plasma arc |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6052072B2 (en) * | 1979-09-11 | 1985-11-16 | 三菱電機株式会社 | Parcel conveyance equipment for high-rise buildings |
| JPS6028963B2 (en) * | 1980-12-05 | 1985-07-08 | 元之助 新井 | road joint |
-
1988
- 1988-03-28 JP JP63074112A patent/JPH0638985B2/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6028963U (en) * | 1983-07-30 | 1985-02-27 | 株式会社 三社電機製作所 | power supply |
| JPS6052072U (en) * | 1983-09-20 | 1985-04-12 | 日立精工株式会社 | Welding power supply |
| JPS61216861A (en) * | 1985-03-20 | 1986-09-26 | Osaka Denki Kk | Plasma arc cutting device |
| JPS61286068A (en) * | 1985-06-12 | 1986-12-16 | Hitachi Seiko Ltd | Power source for arc welding |
| JPS62292273A (en) * | 1986-06-13 | 1987-12-18 | Hitachi Seiko Ltd | Power source for plasma arc |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02144276U (en) * | 1989-04-28 | 1990-12-06 | ||
| JP2005271019A (en) * | 2004-03-24 | 2005-10-06 | Matsushita Electric Ind Co Ltd | Arc welding robot |
| US7615719B2 (en) * | 2006-09-11 | 2009-11-10 | Hypertherm, Inc. | Autonomous plasma cutting system |
| US8203096B2 (en) | 2006-09-11 | 2012-06-19 | Hypertherm, Inc. | Wearable autonomous material processing system |
| US8350182B2 (en) | 2006-09-11 | 2013-01-08 | Hypertherm, Inc. | Portable autonomous material processing system |
| US8890021B2 (en) | 2006-09-11 | 2014-11-18 | Hypertherm, Inc. | Portable autonomous material processing system |
| US9522438B2 (en) | 2012-11-09 | 2016-12-20 | Hypertherm, Inc. | Battery-controlled plasma arc torch system |
| US9550251B2 (en) | 2014-03-28 | 2017-01-24 | Hypertherm, Inc. | Power supply assembly for a plasma arc torch system |
| US9967964B2 (en) | 2014-05-30 | 2018-05-08 | Hypertherm, Inc. | Cooling plasma cutting system consumables and related systems and methods |
| US10827600B2 (en) | 2014-05-30 | 2020-11-03 | Hypertherm, Inc. | Cooling plasma cutting system consumables and related systems and methods |
| US11622440B2 (en) | 2014-05-30 | 2023-04-04 | Hypertherm, Inc. | Cooling plasma cutting system consumables and related systems and methods |
| US10736204B2 (en) | 2016-10-21 | 2020-08-04 | Hypertherm, Inc. | Plasma power tool |
| CN112475568A (en) * | 2020-10-28 | 2021-03-12 | 上海沪工焊接集团股份有限公司 | Arc guide control method and device for double-voltage plasma cutting machine |
| CN112475568B (en) * | 2020-10-28 | 2024-02-20 | 上海沪工焊接集团股份有限公司 | Arc guiding control method and device for double-voltage plasma cutting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0638985B2 (en) | 1994-05-25 |
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