WO2009157463A1 - プラズマ切断トーチ - Google Patents
プラズマ切断トーチ Download PDFInfo
- Publication number
- WO2009157463A1 WO2009157463A1 PCT/JP2009/061452 JP2009061452W WO2009157463A1 WO 2009157463 A1 WO2009157463 A1 WO 2009157463A1 JP 2009061452 W JP2009061452 W JP 2009061452W WO 2009157463 A1 WO2009157463 A1 WO 2009157463A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cut
- plasma
- nozzle member
- secondary airflow
- swirl
- Prior art date
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Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3442—Cathodes with inserted tip
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3457—Nozzle protection devices
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3468—Vortex generators
Definitions
- the present invention can selectively perform a cutting surface substantially perpendicular to the surface and having a substantially right upper edge and a cutting surface having a substantially curved upper edge when cutting a workpiece typified by a steel plate.
- the present invention relates to the plasma cutting torch.
- a steel structure represented by a bridge is formed by welding a cut material obtained by cutting a steel plate into a desired shape to form a number of structural members and assembling these structural members. Therefore, at the end of the cutting material constituting each structural member, there are a weld surface welded to the other member and an exposed surface exposed to the atmosphere.
- the cutting material of the structural member constituting the steel structure is generally cut using a gas cutting method or a plasma cutting method, and vertical cutting in which the cut surface is substantially perpendicular to the surface of the steel plate. Applied.
- the surface is painted to prevent the occurrence of rust.
- the exposed surface formed by cutting the material to be cut will also be painted, but the intersection (edge) between the cut surface constituting the exposed surface and the surface of the steel sheet is substantially perpendicular, and this edge As a starting point, there was a problem that the coating film was easily peeled off.
- the edge is subjected to secondary processing by a sander or a chamfering machine to make it a substantially curved surface or a dull angle, and then painted Has been given.
- a sander or a chamfering machine to make it a substantially curved surface or a dull angle, and then painted Has been given.
- Patent Document 1 Even the invention described in Patent Document 1 is not perfect, and there are still problems to be solved. That is, in cutting, since the groove cutting and the cutting for cutting the upper and lower edges in a curved shape are selectively performed, there is a problem that the control becomes complicated.
- An object of the present invention is to provide a plasma cutting torch capable of cutting an edge between a cut surface and a surface into a right angle or a curved surface in a process of cutting a workpiece.
- a plasma cutting torch cuts a material to be cut by converting plasma gas supplied between an electrode and a nozzle member provided coaxially with the electrode into a plasma and injecting it from the nozzle member.
- a plasma cutting torch for supplying to a second nozzle member arranged outside the nozzle member and coaxially with the nozzle member, and a passage formed between the nozzle member and the second nozzle member;
- For the second secondary air current gas supply passage are those composed and a secondary air flow gas supply member for supplying secondary air flow gas.
- the swirling direction of the secondary airflow gas can be changed. For this reason, the intersection (edge) of the surface of a to-be-cut material and a cut surface can be cut
- the swirling of the secondary gas flow has a close relationship with the perpendicularity to the surface of the cut surface.
- the secondary airflow gas is turned to the right, so that the cut surface is substantially perpendicular to the surface and the edge between the surface and the cut surface is substantially perpendicular.
- Cutting can be performed.
- the cut surface is inclined with respect to the surface and the edge between the surface and the cut surface is curved.
- the edge of the surface and the cutting surface is substantially perpendicular, and the edge of the surface and the cutting surface is curved. Can be selectively formed.
- the swirl direction of the secondary air flow gas in the course of cutting, it is possible to form a cut surface with substantially perpendicular edges and a cut surface with curved edges.
- FIG. 3 is a cross-sectional view of FIG. 1 taken along line III-III in FIG.
- FIG. 4 is a cross-sectional view of FIG. 1 taken along the line IV-IV of FIG. It is a figure explaining the supply system which supplies secondary airflow gas to a plasma cutting torch.
- FIG. 1 is a cross-sectional view illustrating the configuration of a plasma cutting torch.
- FIG. 2 is a view of the plasma cutting torch of FIG. 1 as viewed from the right side of FIG. 3 is a cross-sectional view of FIG. 1 taken along the line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG.
- FIG. 5 is a view for explaining a supply system for supplying the secondary air flow gas to the plasma cutting torch.
- the plasma cutting torch A has an electrode 2 disposed on the shaft 1a of the torch body 1, and is fitted to the cylindrical member 3a of the electrode base 3 and attached to the plasma cutting torch A. And it is comprised so that it can detach
- the electrode 2 and the cylindrical member 3 a are each formed of a conductive material, are in contact with each other and connected to the electrode base 3, and are connected to a power supply device (not shown) through the electrode base 3.
- An insulating cylinder member 3b is disposed on the outer periphery of the cylinder member 3a of the electrode table 3, and an insulating centering stone 4 formed in a cylindrical shape is fitted into the cylindrical member 3b.
- a conductive nozzle member 5 formed in a cup shape is disposed on the outer periphery of the centering stone 4 and is fitted to a distribution member 23 described later.
- a second nozzle member 6 serving as an insulating cap is disposed on the outer peripheral portion of the nozzle member 5, and the second nozzle member 6 is fastened to the torch body 1, whereby the electrode 2, centering stone 4, nozzle member 5 is attached to the electrode table 3.
- the nozzle member 5 and the electrode 2 are insulated because the cylindrical member 3b and the centering stone 4 are interposed between the nozzle member 5 and the electrode 2, and the nozzle member 5 is connected to a power supply device (not shown) via the distribution member 23 and the supply member 22. It is connected.
- the plasma chamber 10 is formed by the electrode 2, the centering stone 4, and the nozzle member 5.
- a secondary air flow gas passage 11 is formed between the nozzle member 5 and the second nozzle member 6.
- a plasma gas supply path 7 is connected to the plasma chamber 10 via a centering stone 4 so that plasma gas can be supplied to the plasma gas supply path 7 from a plasma gas supply device (not shown).
- the centering stone 4 is formed with a swirl hole 4a, and the plasma gas supplied to the plasma chamber 10 can be swirled in the swirl direction of the swirl hole 4a.
- the turning direction of the turning hole 4a formed in the centering stone 4 is not limited, and what is configured to turn the plasma gas in the clockwise direction or in the counterclockwise direction is provided. Accordingly, it is possible to appropriately select and mount in accordance with the cutting direction by the plasma cutting torch A and the direction of the product.
- the secondary airflow gas passage 11 has a first swirl hole 20 serving as a first swirl hole formed in an opposite direction and a second swirl hole 21 serving as a second swirl hole.
- the secondary airflow gas is supplied from the first swirl hole 20 or the second swirl hole 21 so that the swirl direction of the secondary airflow gas can be selected.
- the first swirl hole 20 and the second swirl hole 21 are formed in a cylindrical supply member 22 disposed on the front end side of the electrode table 3, and the supply member 22 is distributed inside the supply member 22. It is fitted to the member 23.
- three O-ring grooves 23a are formed on the outer periphery of the distribution member 23, and two gas distribution grooves 23b and 23c are formed between these O-ring grooves 23a.
- the groove 23b is connected to the first secondary airflow gas supply path 12 formed through the supply member 22 and the distribution member 23.
- the groove 23c extends through the supply member 22 and the distribution member 23.
- the formed second secondary air flow gas supply path 13 is connected.
- the turning direction of the first turning hole 20 formed in the supply member 22 is not particularly limited as long as it is turned clockwise or counterclockwise.
- the turning direction of the second turning hole 21 needs to be opposite to the turning direction of the first turning hole 20. That is, when the turning direction of the first turning hole 20 is clockwise, the turning direction of the second turning hole 21 is limited to the counterclockwise direction. Therefore, when the turning direction of the first turning hole 20 is counterclockwise, the turning direction of the second turning hole 21 is clockwise.
- the number and diameter of the holes constituting the first swirl hole 20 and the second swirl hole 21 are not particularly limited, and are preferably set as appropriate in accordance with the specifications of the plasma cutting torch A. In this case, it is preferable that the number and diameter of the first swirl hole 20 are equal to the number and diameter of the second swirl hole 21.
- the first secondary airflow gas supply path 12 is connected to the secondary airflow gas supply member 15 through the pipe 12a, and the second secondary airflow gas supply path 13 is also connected to the second airflow gas supply path 13 through the pipe 13a.
- the secondary airflow gas supply member 15 is connected.
- the secondary airflow gas supply member 15 has a function of selectively supplying the secondary airflow gas to the first secondary airflow supply path 12 and the second secondary airflow gas supply path 13 formed in the plasma cutting torch A.
- the specific configuration or the structure is not limited as long as the configuration can exhibit this function.
- the secondary air flow gas supply member 15 is configured by using an electromagnetic on-off valve attached to each of the pipes 12a and 13a or a switching valve connected to the pipes 12a and 13a. Therefore, it is possible to set the supply path to either one by selectively opening / closing the electromagnetic on-off valve or by switching the control valve.
- a secondary airflow gas supply device 16 is connected to the secondary airflow gas supply member 15.
- the secondary airflow gas supply device 16 may be any device that can supply oxygen gas or other gas as the secondary airflow gas to the secondary airflow gas supply member 15, and is configured by factory piping, a cylinder, or the like. Yes.
- the secondary air flow gas is supplied to the first secondary air flow gas supply passage 12 or the second secondary air flow gas supply passage 13. It is possible to supply. That is, it is possible to select the first secondary airflow gas supply path 12 and the second secondary airflow gas supply path 13 to supply the secondary airflow gas, and by selecting these supply paths 12 and 13 It is possible to select the swirl direction of the secondary airflow gas supplied to the secondary airflow gas passage 11.
- the turning direction of the first turning hole 20 is the clockwise direction
- the turning direction of the second turning hole 21 is the counterclockwise direction
- the turning direction of the plasma arc is the clockwise direction.
- the right side is the product.
- the edge of the product is cut at a substantially right angle.
- the turning direction of the secondary airflow gas is clockwise. Therefore, in the secondary airflow gas supply member 15, the secondary airflow gas supply system is selected as the pipe 12 a and the secondary airflow gas rotated clockwise is supplied to the secondary airflow gas passage 11.
- the plasma cutting torch A is mounted on a traveling carriage (not shown) and arranged perpendicular to the surface of the material to be cut.
- Plasma gas is supplied to the plasma chamber 10. At this time, the supplied plasma gas is swung clockwise by the centering stone 4. Further, the secondary airflow gas is supplied to the first secondary airflow gas supply path 12, and the secondary airflow gas is supplied to the secondary airflow gas passage 11 while being swung clockwise.
- the plasma gas supplied by discharging between the electrode 2 and the nozzle member 5 is turned into plasma, and a pilot arc is formed and injected.
- the discharge between the electrode 2 and the nozzle member 5 is interrupted and discharged between the electrode 2 and the material to be cut to form a main arc. To do.
- the secondary airflow gas that turns clockwise along the main arc injected is injected.
- the plasma cutting torch A is caused to travel along a preset scheduled cutting line while cutting the material to be cut by the main arc jetted from the nozzle member 5 and the secondary airflow gas jetted from the second nozzle member 6.
- the material to be cut is cut into a desired shape.
- the cut surface on the right side toward the downstream side in the cutting direction is formed such that the edge between the cut surface and the surface is substantially perpendicular.
- the secondary airflow gas supply member 15 selects the secondary airflow gas supply system as the pipe 13a and supplies the secondary airflow gas swirled counterclockwise to the secondary airflow passage 11.
- the plasma gas swirling clockwise by the centering stone 4 is supplied to the plasma chamber 10. Further, the secondary airflow gas is supplied to the second secondary airflow gas supply passage 13 and supplied to the secondary airflow gas passage 11 while turning the secondary airflow gas counterclockwise.
- the plasma gas discharged and supplied between the electrode 2 and the nozzle member 5 is converted into plasma to form a pilot arc and ejected.
- the electrode 2 And the discharge between the nozzle member 5 and the electrode 2 and the material to be cut to form a main arc.
- the secondary airflow gas which turns counterclockwise along the main arc injected is injected.
- the plasma cutting torch A is set to a preset scheduled cutting line while cutting the material by the main arc injected from the nozzle member 5 and the secondary airflow gas injected from the second nozzle member 6 and turning counterclockwise.
- the material to be cut is cut into a desired shape by running along. At this time, an edge between the cut surface and the surface of the right cut surface toward the downstream side in the cutting direction is formed in a substantially curved shape.
- a predetermined cutting line includes a portion where the edge should be cut at a right angle and a portion where the edge should be cut into a curved surface.
- the secondary air flow gas supply member 15 is operated as described above to supply the secondary air flow gas to the first secondary air flow gas supply path 12 and rotate the clockwise direction.
- the next gas stream is jetted along the main arc and cut. Thereby, a cut surface becomes substantially perpendicular
- the secondary airflow gas is supplied to the second secondary airflow gas supply passage 13 and the secondary airflow gas swung counterclockwise is also injected along the main arc. Disconnect. Thereby, the edge of a cut surface becomes substantially curved surface shape.
- the swirling direction of the secondary air flow gas is selected clockwise or counterclockwise as described above. In addition to this, it is preferable to select the turning direction of the main arc.
- the centering stone whose turning direction is set to the clockwise direction is selected and mounted. At the same time, it is possible to realize cutting with improved quality by turning the secondary air flow gas clockwise. If you want to cut a curved surface, select a centering stone whose turning direction is set counterclockwise and turn the secondary air flow gas counterclockwise. It is possible to realize a cut surface having an edge.
- the edge of the surface of the workpiece and the cut surface is cut into a substantially curved shape using the plasma cutting torch of the present invention
- the edge is substantially curved when the plasma cutting torch is arranged perpendicular to the surface of the workpiece.
- the cut surface is inclined so that the kerf is wider on the upper surface side and narrower on the lower surface side. For this reason, when a cut surface having a substantially curved edge and substantially perpendicular to the surface is formed, it is necessary to incline the plasma cutting torch at an angle that can cancel the above-described inclination.
- the plasma cutting torch of the present invention is advantageous when it is used to cut an exposed surface that is a structural member in a bridge or the like and is exposed to the atmosphere.
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Plasma Technology (AREA)
- Arc Welding In General (AREA)
Abstract
Description
1 トーチ本体
1a 軸
2 電極
3 電極台
3a、3b 筒部材
4 センタリングストーン
4a 旋回孔
5 ノズル部材
6 第2ノズル部材
7 プラズマガス供給路
10 プラズマ室
11 二次気流ガス通路
12 第1二次気流ガス供給路
12a 配管
13 第2二次気流ガス供給路
13a 配管
15 二次気流ガス供給部材
16 二次気流ガス供給装置
20 第1旋回孔
21 第2旋回孔
22 供給部材
23 分配部材
23a Oリング溝
23b、23c 溝
25 Oリング
Claims (1)
- 電極と該電極と同軸に設けたノズル部材との間に供給したプラズマガスをプラズマ化してノズル部材から噴射して被切断材を切断するプラズマ切断トーチであって、ノズル部材の外側であってノズル部材と同軸に配置された第2のノズル部材と、前記ノズル部材と第2のノズル部材の間に形成された通路に供給する二次気流ガスを旋回させる第1の旋回孔と、前記第1の旋回孔と接続された第1の二次気流ガス供給路と、前記ノズル部材と第2のノズル部材の間に形成された通路に供給する二次気流ガスを前記第1の旋回孔の旋回方向とは反対方向に旋回させる第2の旋回孔と、前記第2の旋回孔と接続された第2の二次気流ガス供給路と、前記第1の二次気流ガス供給路又は第2の二次気流ガス供給路に対し二次気流ガスを供給する二次気流ガス供給部材と、を有することを特徴とするプラズマ切断トーチ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200980123241.2A CN102066033B (zh) | 2008-06-24 | 2009-06-24 | 等离子切割枪 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-164551 | 2008-06-24 | ||
JP2008164551A JP2010005637A (ja) | 2008-06-24 | 2008-06-24 | プラズマ切断トーチ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009157463A1 true WO2009157463A1 (ja) | 2009-12-30 |
Family
ID=41444527
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/061452 WO2009157463A1 (ja) | 2008-06-24 | 2009-06-24 | プラズマ切断トーチ |
Country Status (4)
Country | Link |
---|---|
JP (1) | JP2010005637A (ja) |
KR (1) | KR20110036542A (ja) |
CN (1) | CN102066033B (ja) |
WO (1) | WO2009157463A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106715027B (zh) * | 2014-08-12 | 2020-04-21 | 海别得公司 | 用于等离子弧焊炬的成本有效的筒 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07144278A (ja) * | 1993-07-27 | 1995-06-06 | Komatsu Ltd | プラズマアーク溶接方法 |
JPH0963790A (ja) * | 1995-08-24 | 1997-03-07 | Koike Sanso Kogyo Co Ltd | プラズマトーチのノズル |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6717096B2 (en) * | 2001-02-27 | 2004-04-06 | Thermal Dynamics Corporation | Dual mode plasma arc torch |
US6774336B2 (en) * | 2001-02-27 | 2004-08-10 | Thermal Dynamics Corporation | Tip gas distributor |
-
2008
- 2008-06-24 JP JP2008164551A patent/JP2010005637A/ja active Pending
-
2009
- 2009-06-24 CN CN200980123241.2A patent/CN102066033B/zh not_active Expired - Fee Related
- 2009-06-24 WO PCT/JP2009/061452 patent/WO2009157463A1/ja active Application Filing
- 2009-06-24 KR KR1020107028837A patent/KR20110036542A/ko not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07144278A (ja) * | 1993-07-27 | 1995-06-06 | Komatsu Ltd | プラズマアーク溶接方法 |
JPH0963790A (ja) * | 1995-08-24 | 1997-03-07 | Koike Sanso Kogyo Co Ltd | プラズマトーチのノズル |
Also Published As
Publication number | Publication date |
---|---|
CN102066033B (zh) | 2014-11-26 |
JP2010005637A (ja) | 2010-01-14 |
KR20110036542A (ko) | 2011-04-07 |
CN102066033A (zh) | 2011-05-18 |
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