CN103143826A - Spray nozzle of plasma cutting torch - Google Patents
Spray nozzle of plasma cutting torch Download PDFInfo
- Publication number
- CN103143826A CN103143826A CN2013100862511A CN201310086251A CN103143826A CN 103143826 A CN103143826 A CN 103143826A CN 2013100862511 A CN2013100862511 A CN 2013100862511A CN 201310086251 A CN201310086251 A CN 201310086251A CN 103143826 A CN103143826 A CN 103143826A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- spray nozzle
- cutting torch
- plasma cutting
- plasma
- 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
Links
Images
Landscapes
- Plasma Technology (AREA)
Abstract
The invention discloses a spray nozzle of a plasma cutting torch, and the spray nozzle comprises a hollow conical spray nozzle body; the front end of the spray nozzle body is provided with a cylindrical spray nozzle channel; and the range of the long-diameter ratio L/D of the spray nozzle channel is 1 to 2.4. The spray nozzle of the plasma cutting torch is made of a high-conductivity material with the conductivity more than 90 percent IACS (International Annealed Copper Standard). The roughness of the inner surface of the spray nozzle channel is below Ra1.6. According to the spray nozzle of the plasma cutting torch, the burning of plasma arc to the spray nozzle can be effectively reduced, the service life of the spray nozzle is significantly prolonged, and the use cost is reduced.
Description
Technical field
The present invention relates to a kind of plasma cutting machines, be specifically related to a kind of plasma cutting torch nozzle.
Background technology
The plasma cutting torch nozzle is the consumable accessory in plasma cutting machines.Existing plasma cutting torch nozzle, in order to improve cutting power, the draw ratio L/D design load of its nozzle oral area large (be commonly L/D〉2.4), draw ratio is larger, flow through time of nozzle cavity of plasma arc is also just longer, and the time that nozzle is burnt by plasma arc is also just long; Again owing to being subjected to plasma gas flow velocity stability influence, be prone to nozzle overheated and cause the nozzle scaling loss.
The existing normally used material of nozzle material is alloyed copper, and the electric conductivity of alloyed copper, thermal conductivity are relatively poor, thus cause the metal surface resistance of jet hole large, easy calcination jet hole.
Based on above reason, the existing easy scaling loss of plasma cutting torch nozzle, cutting life is short, has greatly improved processing cost.
Summary of the invention
Technical problem to be solved by this invention is to solve the plasma cutting torch nozzle shortcoming that scaling loss is fast when cutting, cutting life is short.
For addressing the above problem, plasma cutting torch nozzle of the present invention comprises the conical nozzle body of hollow, and the nozzle body front end is provided with the nozzle passage of cylindrical shape, and the ratio range of the draw ratio L/D of nozzle passage is 1～2.4; The nozzle-integrated employing conductance of plasma cutting torch of the present invention is made greater than the high conductivity material of 90%IACS; The surface roughness of its nozzle passage inner surface is below Ra1.6.
After adopting technique scheme, because the scope of nozzle passage draw ratio (the diameter ratio of axial length and circular hole) L/D is 1-2.4, thereby reduced the sheet resistance between nozzle and plasma arc, shorten plasma arc and flow through time of nozzle passage, reduce plasma arc burning nozzle passage.The nozzle passage roughness makes plasma arc gas Rapid Flow through nozzle passage below Ra1.6, has improved the plasma arc flow velocity, reduces the high temperature at plasma gas center to the heat transmission of nozzle passage.Thereby can effectively reduce plasma arc to the burning of nozzle, significant prolongation nozzle service life, reduce use cost.
Further, plasma cutting torch nozzle of the present invention, the draw ratio of its nozzle passage is 1.4 to 2.2.Can further improve cutting life.
Further, plasma cutting torch nozzle of the present invention, the draw ratio of its nozzle passage is 2, the surface roughness of nozzle passage inner surface is Ra1.0, can reach maximum life span.
Description of drawings
The profile of the plasma welding torch that Fig. 1 is comprised of plasma cutting torch nozzle, electrode, radome;
Fig. 2 is the structural representation of plasma cutting torch nozzle of the present invention;
In Fig. 2: L represents the length of nozzle passage; D represents the diameter of nozzle passage.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, plasma welding torch is made of nozzle body 1, electrode 2, radome 5, electrode 2 is arranged on nozzle body 1 inner chamber, radome 5 is arranged on nozzle body 1 front position and assembling between the two forms the cooling chamber 3 around nozzle body 1 front end, during work, outside secondary air is interior mobile at cooling chamber 3, the arrow indication in streamer mode such as accompanying drawing.
Wherein electrode 2 is made of two parts: electrode 2 front end centres are provided with the emitter 21 for the emission of plasma arc; Electrode 2 inside are formed with a cooling chamber 22.
As shown in Figure 2, the plasma cutting torch nozzle, the conical nozzle body 1 that comprises hollow, nozzle body 1 front end is provided with the nozzle passage 10 of cylindrical shape, plasma arc 4 is realized extruding by nozzle passage 10 and is shunk and improve density, plasma arc is warmed and accelerates simultaneously, then sprays to workpiece, makes the workpiece local melting so that workpiece is cut.
The plasma arc production process, at first be to apply high frequency voltage between electrode 2 and plasma cutting torch nozzle, the guide's arc that ignites discharges between them, the plasma air-flow produces from plasma cutting torch nozzle rear cavity, along with flowing of plasma air-flow, guide's arc that electrode produces is shifted to plasma cutting torch spray nozzle front end center, the dump of executing between electrode 2 and plasma cutting torch nozzle simultaneously, interrupt forerunner arc, main arc ignites.Plasma arc sprays at a high speed the nozzle passage 10 of spray nozzle front end.Then plasma arc pushed and compress by nozzle passage 10, improving density, producing the high temperature and high speed injection stream, workpiece is cut.
To cut or bore a hole be all by first producing guide's arc between electrode 2 and plasma cutting torch nozzle because each starting the arc rises, and the high temperature article on plasma cutting nozzle of cutting torch front end of guide's arc is a kind of damage.In prior art, be to improve cut quality, what take is the method for simple increasing nozzle passage draw ratio L/D, and its draw ratio General Requirements is greater than 2.4.Before the main arc that ignites, forerunner arc is trapped near plasma cutting torch nozzle oral area always, and due to its big L/D ratio design, longer in the time that the nozzle oral area stops, heat more concentrates on the oral area of nozzle.That is to say to have cut at every turn and cut or bore a hole all in the loss of aggravation to nozzle passage 10.Thereby the plasma cutting torch nozzle life will be obviously shortened in the big L/D ratio design.
Experiment is found: the burning of the Conductivity nozzle of nozzle, the material of poor electric conductivity burns faster.Nozzle passage 10 roughness article on plasma cutting nozzle of cutting torch life-span impact greatly, to carrying out surface treatment at nozzle passage 10 inner surfaces, reduce surface roughness, can reduce air-flow by resistance, the raising plasma flow velocity of metal surface, shorten arc in the nozzle oral area surface time of staying, thereby improve the metal life-span.
Plasma cutting torch nozzle of the present invention comprises the conical nozzle body 1 of hollow, and nozzle body 1 front end is provided with the nozzle passage 10 of cylindrical shape, and the ratio range of the draw ratio L/D of nozzle passage 10 is 1～2.4.The nozzle-integrated employing conductance of plasma cutting torch is made greater than the high conductivity material of 90%IACS, and adoptable material ranges is extensive, for example T2, T1, TU2T, and the surface roughness of nozzle passage 10 inner surfaces is below Ra1.6.
After adopting such scheme, plasma cutting torch nozzle of the present invention can reach higher cutting power, can effectively improve the metal life-span again.
Reach the oral area loss of cutting steel plate rear nozzle under the condition that equates by calorimetric analysis, plasma cutting torch nozzle of the present invention and contrast product compared result as follows:
The air-flow that contrast product is drawn is the column air-flow, and the air-flow that in the present invention, nozzle is drawn is the spindle air-flow; More than both temperature all can reach 900 degree.Because difference and nozzle passage 10 length of its airflow shaped shorten, the flow velocity of air-flow of the present invention (arc column) will be higher than contrast product, thereby has guaranteed cutting power, and electric arc shortened greatly in the time that the nozzle oral area stops simultaneously, had extended the metal life-span.
Cutting will occur after the generation of guide's arc nozzle first will carry out the gas switching, switches the required time of gas, wishes that in theory gas switches the synchronization of completing in the main arc appearance.This whole handoff procedure is completed at the oral area of nozzle.Yet replacement process is subjected to the impact of cutting steam supply time length, before pilot arc disappears, the cutting aperture inboard because of and electrode between discharge continue to heat.Because of the large draw ratio design of contrast product, air-flow (arc column) becomes column easily to cause the melting of cutting aperture internal surface, and ablated area increases.
After the voltage change such as rising of the arc voltage that cutting aperture or small arc-shaped or acute angle cause because of shape, electric arc interrupts guaranteeing electric current, gas pressure to a certain degree, the setting value of cutting speed in order to prevent from cutting, therefore more extend the time of pilot arc, easilier stayed the ablation scar on the cut workpiece surface.
Embodiment one
Cutting object: thickness is 25MM, and material is the ship plate of Q235 carbon steel; Experimental technique: cutting endoporus Φ 30 cylindrical Φ 40mm annular workpieces after perforation.By the perforation number of times of cut workpiece after the starting the arc, verify plasma cutting torch nozzle of the present invention and contrast product cutting life and cut quality, and carry out result of the present invention according to the consume state of experimental phenomena and consumable accessory and prove.
In the present embodiment, the draw ratio L/D=2 of nozzle passage 10; The surface roughness of nozzle passage 10 inner surfaces is Ra1.6.Nozzle as a comparison case, its L/D=2.5.In the lifetime of a nozzle, add up quantity and the checking cutting effect of its steel plate perforation.
Experimental result:
1) nozzle accumulative total cut workpiece number of the present invention: 530; Perforation number: 1060 times; Cutting Length: 116.5m.Consumable accessory state after cutting: a small amount of scaling loss of nozzle head, blackening, oxidized, the hole becomes greatly a little, the slight internal scaling loss, endoporus adheres to a small amount of slag.
2) contrast groups accumulative total cut workpiece number: 320; Perforation number: 640 times; Cutting Length: 70.3m.Consumable accessory state after cutting: the nozzle scaling loss, blackening, oxidized, Kong Bianda is crooked, inner scaling loss, endoporus adheres to a small amount of slag.
Experimental result can be found, nozzle of the present invention, and in the perforation purposes, its life-span is 1.65 times of Comparative Examples, thereby the present invention can reduce production costs greatly, and production efficiency is provided.
Embodiment two
Cutting object: thickness is 20MM, and material is the ship plate of Q235 carbon steel.In the present embodiment, plasma cutting torch nozzle of the present invention, the L/D=2 of its nozzle passage 10; Nozzle passage 10 the Inner hole wall be polished into surface roughness Ra 1.0; The material of nozzle is copper product T2.Contrast groups L/D=2.8.In the lifetime of a nozzle, add up the line length of its cutting steel plate.In plasma cutting torch nozzle of the present invention, lifetime, line of cut length is 1,657,566mm; Contrast groups is 919,193mm at the line length of nozzle cuts sheet material in useful life period; Nozzle of the present invention is 1.8 times of imported product service life, can greatly reduce production costs.
Embodiment three
Unique difference of the present embodiment and embodiment two be with nozzle passage 10 the Inner hole wall be polished into surface roughness Ra 0.8.In the lifetime of a nozzle, add up the line length of its cutting steel plate.In plasma cutting torch nozzle of the present invention, lifetime, line of cut length is Isosorbide-5-Nitrae 63,786mm; Contrast groups is 919,193mm at the line length of nozzle cuts sheet material in useful life period; Nozzle of the present invention is 1.6 times of imported product service life.
Found through experiments, plasma cutting torch nozzle of the present invention, the whole conductance that adopts is greater than the high conductivity material manufacturing of 90%IACS, and the draw ratio of nozzle passage 10 is set to 1.4 to 2.2, the Inner hole wall surface roughness of nozzle passage 10 can reach service life preferably below Ra1.6.
Also find by experiment, plasma cutting torch nozzle of the present invention, the whole conductance that adopts is greater than the high conductivity material manufacturing of 90%IACS, the draw ratio L/D=2 of its nozzle passage 10; It is optimum combination that the Inner hole wall of nozzle passage 10 is polished into surface roughness Ra 1.0, under the prerequisite that guarantees cut quality, can reach the highest service life.
Plasma cutting torch nozzle of the present invention is 10MM～25MM in cutting thickness, when material is the ship plate of Q235 carbon steel, especially possesses very high cost performance.
Plasma cutting torch nozzle of the present invention by the optimal design to the surface roughness of nozzle passage 10 draw ratios, nozzle-integrated conductance, nozzle passage 10 inner surfaces, significant prolongation nozzle service life, reduces use cost.
Claims (3)
1. plasma cutting torch nozzle, the conical nozzle body (1) that comprises hollow, nozzle body (1) front end is provided with the nozzle passage (10) of cylindrical shape, it is characterized in that: the whole conductance that adopts of this plasma cutting nozzle of cutting torch is made greater than the material of 90%IACS; The ratio range of the draw ratio L/D of nozzle passage (10) is 1～2.4; The surface roughness of nozzle passage (10) inner surface is below Ra1.6.
2. plasma cutting torch nozzle according to claim 1, it is characterized in that: the draw ratio of nozzle passage (10) is 1.4 to 2.2.
3. plasma cutting torch nozzle according to claim 1, it is characterized in that: the draw ratio of nozzle passage (10) is 2, the surface roughness of nozzle passage (10) inner surface is Ra1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100862511A CN103143826A (en) | 2013-03-19 | 2013-03-19 | Spray nozzle of plasma cutting torch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100862511A CN103143826A (en) | 2013-03-19 | 2013-03-19 | Spray nozzle of plasma cutting torch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103143826A true CN103143826A (en) | 2013-06-12 |
Family
ID=48542294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100862511A Pending CN103143826A (en) | 2013-03-19 | 2013-03-19 | Spray nozzle of plasma cutting torch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103143826A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990899A (en) * | 2014-06-03 | 2014-08-20 | 安徽西锐重工科技有限公司 | Cutting torch nozzle of plasma cutting machine and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02263577A (en) * | 1989-04-05 | 1990-10-26 | Techno Jiyukou:Kk | Plasma arc cutting device |
| JPH0919771A (en) * | 1995-07-04 | 1997-01-21 | Sumitomo Metal Ind Ltd | Nozzle for plasma arc welding torch |
| CN2430240Y (en) * | 2000-07-05 | 2001-05-16 | 机械工业部哈尔滨焊接研究所 | High melting speed, low dilute rate plasma build-up welding gun |
| CN101648313A (en) * | 2008-08-15 | 2010-02-17 | 中国海洋石油总公司 | Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof |
| CN203124943U (en) * | 2013-03-19 | 2013-08-14 | 安徽西锐重工科技有限公司 | Plasma cutting torch nozzle |
-
2013
- 2013-03-19 CN CN2013100862511A patent/CN103143826A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02263577A (en) * | 1989-04-05 | 1990-10-26 | Techno Jiyukou:Kk | Plasma arc cutting device |
| JPH0919771A (en) * | 1995-07-04 | 1997-01-21 | Sumitomo Metal Ind Ltd | Nozzle for plasma arc welding torch |
| CN2430240Y (en) * | 2000-07-05 | 2001-05-16 | 机械工业部哈尔滨焊接研究所 | High melting speed, low dilute rate plasma build-up welding gun |
| CN101648313A (en) * | 2008-08-15 | 2010-02-17 | 中国海洋石油总公司 | Nozzle made of composite material for plasma welding guns and cutting guns and manufacturing method thereof |
| CN203124943U (en) * | 2013-03-19 | 2013-08-14 | 安徽西锐重工科技有限公司 | Plasma cutting torch nozzle |
Non-Patent Citations (1)
| Title |
|---|
| 孙景荣: "等离子切割炬喷嘴的改进", 《电焊机》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103990899A (en) * | 2014-06-03 | 2014-08-20 | 安徽西锐重工科技有限公司 | Cutting torch nozzle of plasma cutting machine and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101341872B1 (en) | Diffuser to maximize the heat dissipation area with gas welding torch | |
| JP6744177B2 (en) | Plasma torch and its components | |
| CN206216093U (en) | Improved water-cooled welding gun | |
| US11310901B2 (en) | Plasma torch and components thereof | |
| WO2012142403A1 (en) | Improved method for starting a multi-gas plasma arc torch | |
| US11420286B2 (en) | Consumable designs for a plasma arc torch | |
| CN107186322B (en) | Half-split hollow tungsten electrode coaxial wire feeding inert gas shielded welding gun | |
| CN102773596A (en) | Narrow gap double-wire welding gun | |
| CN104289799A (en) | Narrow gap welding current contact nozzle with aluminum oxide insulating coating | |
| CN210908491U (en) | Plasma cutting gun | |
| CN203124943U (en) | Plasma cutting torch nozzle | |
| JP2014004629A (en) | Electrode for plasma cutting torches and use of the same | |
| CN103143826A (en) | Spray nozzle of plasma cutting torch | |
| US20050133484A1 (en) | Nozzle with a deflector for a plasma arc torch | |
| CN214443770U (en) | Gas-cooled plasma cutting torch | |
| JP2014007126A (en) | Plasma torch | |
| CN204584483U (en) | Electrode wheel | |
| CN205600121U (en) | Plasma cutting nozzle | |
| JP5959160B2 (en) | Plasma welding torch | |
| WO1995018521A1 (en) | Plasma torch | |
| CN214134434U (en) | High-low frequency general plasma cutting torch device | |
| CN205147552U (en) | Dark groove submerged arc welding in narrow clearance is with leading electric nozzle | |
| CN206230140U (en) | Plasma cutting gun | |
| CN205254323U (en) | Plasma airflow compression focus nozzle | |
| CN220480521U (en) | Plasma cutting gun head structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130612 |