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WO2010093256A1 - Système de torche à plasma portative pourvu d'un système de refroidissement utilisant un second milieu, pour composants électroniques - Google Patents

Système de torche à plasma portative pourvu d'un système de refroidissement utilisant un second milieu, pour composants électroniques Download PDF

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Publication number
WO2010093256A1
WO2010093256A1 PCT/NO2010/000052 NO2010000052W WO2010093256A1 WO 2010093256 A1 WO2010093256 A1 WO 2010093256A1 NO 2010000052 W NO2010000052 W NO 2010000052W WO 2010093256 A1 WO2010093256 A1 WO 2010093256A1
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WIPO (PCT)
Prior art keywords
gas
plasma torch
cooling
electronic components
compressed air
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.)
Ceased
Application number
PCT/NO2010/000052
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English (en)
Inventor
Bendik Sagsveen
Einar Otnes Steffenrud
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.)
Forsvarets Forskningsinstitutt
Forsvarets Forskningsanstalt (FOA)
Original Assignee
Forsvarets Forskningsinstitutt
Forsvarets Forskningsanstalt (FOA)
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 Forsvarets Forskningsinstitutt, Forsvarets Forskningsanstalt (FOA) filed Critical Forsvarets Forskningsinstitutt
Publication of WO2010093256A1 publication Critical patent/WO2010093256A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/02—Plasma welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • B23K37/02—Carriages for supporting the welding or cutting element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
    • H01L23/427—Cooling by change of state, e.g. use of heat pipes
    • H01L23/4275—Cooling by change of state, e.g. use of heat pipes by melting or evaporation of solids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/30—Technical effects
    • H01L2924/301—Electrical effects
    • H01L2924/3011—Impedance

Definitions

  • the present invention relates to a portable plasma torch, that is a plasma torch not being directly connected to external sources for electrisity and/or compressed air. More specifically, the invention relates to a cooling system for portable or detached plasma torches.
  • Plasma torches are used for plasma cutting or shearing.
  • Plasma cutting is a process mainly used to cut work pieces of steel or other types of metal. Pressured air or gas under high pressure is blown with high velocity through a mouth piece. Inside the mouth piece, there is an electrode. The work piece will function as anode, via a ground lead. By means of an electrical field, an electric arc is formed between the electrode and io the work pieve and an ionisation of the air or gas arise, so that plasma is formed.
  • the plasma has a sufficiently high temperature to melt the metal and has a velocity sufficiently high enough to blow the metal away.
  • 20 can weigh 4-5 kg for a machin with a typical output power of 6 kW.
  • a battery arrangement will attend to supply of electrisity, while an air bottle will attend to supply of compressed air or gas.
  • the batteries and air bottle should have a capasity of at least 5 minutes of continous cutting.
  • torches with a longer cutting time is 25 envisageable, such as, for example from 5 to 10 minutes or more, while one at the same time in some embodiments may find cutting times from 5 to 3 minutes adequate.
  • a portable plasma torch is provided with some sort of carrying 30 arrangement, for example harnesses and/or a frame and others.
  • the complete torch should have a total weight allowing a person to relatively easily carry it on the back over a certain distance, in some cases it should also be carried in rugged terrain, that is, it should have the lowest weight possible.
  • the portable torch has a design and size and a handleability being acceptable to the user and preferable simplifying the use of the torch.
  • a plasma torch according to the present invention will be provided with an improved cooling system.
  • Fig. 1 shows a first perspective view of a portable plasma torch.
  • Fig. 2 shows a second perspective view of the portable plasma torch.
  • Fig. 3 shows a perspective view of a first embodiment of a cooling system according to the invention.
  • Fig. 4 shows a perspective view of the cooling system according to the first embodiment.
  • Fig. 5 shows a perspective view of a second embodiment of a cooling system according to the invention.
  • Fig. 6 shows a perspective view of the cooling system according to the second embodiment.
  • Fig. 7 shows a perspective view of the cooling system according to a third embodiment.
  • Fig. 8 shows a perspective view of a fourth embodiment of the invention.
  • the plasma torch is in the description described as “portable”.
  • Plasma torches connected to a supply network is also portable over a limited distance, depending on the length of the wires or cables connecting the plasma torch to the supply system.
  • “portable” it is meant a plasma torch that can be used by the user without being connected to any external supply system.
  • Another word for "portable” in the meaning used in the application could be “detached”.
  • FIG. 1 shows a portable plasma torch 1 according to the invention.
  • the plasma torch 1 comprises a carrying arrangement 2, 3.
  • the carrying arrangement comprises a carrying frame 2 with harnesses 3.
  • a power source in form of a battery arrangement 4 a source of compressed air or gas and an electronics housing 6 are mounted to the carrying frame 2.
  • the plasma torch is furtermore provided with a ground lead 7 with earth clamp 8 and torch cable 9 with torch nozzle 10. At least one electric cable 11 pass between battery 4 and electronics housing 6.
  • a reduction valve 24 is provided in connection with the compressed gas source 5.
  • An pressure regulator 13 is provided in connection with the electronics housing 6. The reduction valve 24 and pressure regulator 13 will be further explained below. It should however be noticed that the reduction valve 24 can also be arranged on the upper side of the plasma torch 1, if this is desirable.
  • FIG. 2 shows a second perspective view of the plasma torch 1.
  • Electronics housing, compressed air source, power source and other equipment is mounted on a carrying frame 2.
  • the earth clamp and torch nozzle will under transport be arranged in suitable holding devices (not shown).
  • Harnesses 3 are attached to the frame, so that the arms of the user are free when he is carrying the plasma torch. This will be an advantage if the plasma torch is to be made operational quickly, as the user do not need to take the arrangement off the back to activate the torch, that is, to attach the earth clamp, open the gas supply etc.
  • the harnesses make it possible for the user to hold and/or bring other equipment, when the plasma torch is not in use, but is merely placed on the back of a user.
  • FIG 3 shows a portable plasma torch 1 with a first embodiment of a cooling ⁇ . arrangement 12 in accordence with the invention.
  • a battery arrangement 4 run the plasma torch.
  • the batteries should preferably have a capasity to give the plasma torch an operating time before recharging of at least 5 minutes before they are discharged, and should also stand quick discharge. Furthermore, it is neccesary for the batteries to have a sufficently high voltage to create an arc.
  • the battery arrangement in the shown example is a number of batteries connected in series.
  • a suitable battery is cell no. ANR26650M1 commersially available at the time of filing, from the manufacturer Al 23 Systems, Watertown, Massachusetts, USA.
  • the battery is a rechargeable cell unit with normal voltage of 3,3 V and normal capacitance of 2,3 Ah. Internal impedance at 1 kHz AC is typically 8 m ⁇ .
  • the batteries can be delivered with an amperage of up to 7OA at continuous discharge, and at 10 sec pulsated discharge, they can delive an amperage of up to 120A.
  • the batteries are connected with the electronics chamber via at least one electric cable 11.
  • the compressed air/gas source in the embodiment is a composite gas cylinder with a pressure of 300 bar and a volume of about 6 litre, of common type.
  • This type of cylinders are e.g. commercially available at the time of filing, from Drager Safety AG & Co. KGaA, L ⁇ beck, Germany.
  • the gas cylinder 5 is provided with a pressure regulator 24 for controlled relase of the gas or air.
  • the gas will have a considerable pressure fall through the pressure regulator and will probably have a pressure of about 8 bar after the regulator. During this pressure fall, the temperature of the gas will fall, as explained further below.
  • the gas is lead throug a gas channel 25 to a gas pressure regulator 13.
  • the gas pressure regulator 13 controls that the resulting pressure of the gas to be lead further to the torch nozzle is correct.
  • Compressed air or gas under a relatively high pressure that is normally around 4-5 bar, is lead further from the gas pressure regulator via a gas cable to the cooling arrangement 12 and further from the cooling arrangement 12 via a gas cable 15 to the torch cable 9 and via the torch cable to the torch nozzle 10.
  • the cooling arrangement 12 in accordence with the first embodiment of the invention is a radiator.
  • the radiator is a radiator of general type, where a fluid is lead through one or more channels provided with cooling ribs.
  • An example of this type of radiator is the modell 21908ERL commersially available at the time of filing, from Earl's Performance, Collinso Dominguez, California, USA.
  • the cooling arrangement or radiator can be of a more basic type, such as a tube, e.g a lightweight metal tube made of for example aluminium, magnesium or other, going in a loop over a plate, e.g, a lightweight metal plate made of for example aluminium, magnesium or other, being tightly connected to the plate for temperature transfer between the cold gas in the tubes and the electronic components in need of cooling, for example being conected to the plate on the opposite side of the plate.
  • a tube e.g a lightweight metal tube made of for example aluminium, magnesium or other
  • a lightweight metal plate made of for example aluminium, magnesium or other
  • the radiator is cooled by using the fall of temperature in the compressed gas due to a fall of pressure in the compressed air/gas, when the air or gas leaves the compressed gas source 5. This will be further explained below, but a simple explanation on this is as follows.
  • the compressed gas source or gas supply in the shown example is an air bottle or gas cylinder with a typical pressure of 300 bar.
  • a reduction valve 24 and a regulator 13 regulate the pressure out of the cylinder down to proper work pressure for the plasma torch.
  • the working pressure is in order of magnitude 5 bar.
  • the gas is regulated from a pressure of up to 300 bar down to around 5 bar, one will get an expansion of the gas from the gas cylinder. This expansion, together with a throttling process in the reduction valve, makes the gas considerably refrigerated. This will be further explained below under the heading "Free expansion and throttling process in air".
  • a gas cylinder with gas such as air pressurized to 300 bar and a typical air consumption for a plasma torch, this process will lead to an air temperature in order of magnitude of -10 0 C after one minute and order of magnitude -20°C after 3 minutes.
  • This cold gas being eventually used in the cutting process, is led through the cooling arrangement 12 in the form of a radiator, a cooling loop, a pressure tight housing or other, where the gas is first used to cool down electronic components being a part of the plasma torch arrangement, before it is led further to the torch nozzle 10.
  • the radiator On a plasma torch with a cooling arrangement according to the first embodiment, the radiator will be cooled by forced convection and the electronic components will be cooled via the cooling plate by conduction.
  • FIG. 4 shows a more detailed view of the cooling arrangement in accordence with the first embodiment of the invention.
  • a radiator 12 is mounted on one side of a cooling plate 17. Electronic components 16 being in need of cooling during use of the plasma torch, are mounted on the other side of the cooling plate 17.
  • the radiator 12 is of a type being cooled by means of gas flowing into the radiator 12 through an inlet 20 and out of the radiator through an outlet 21.
  • the inlet 20 is connected with the first gas cable 14 being connected to the compressed air source 5.
  • the outlet 21 is connected to a second gas cable 15 leading the gas through a solenoid valve 18 and further to the torch cable 9.
  • a solenoid valve 18 or other valve suitable for being controlled by an easily accessible switch arrangement On at least one of the gas cables 14, 15, there is arranged a solenoid valve 18 or other valve suitable for being controlled by an easily accessible switch arrangement.
  • the valve 18 is mounted between the second air cable 15 and the torch cable 9.
  • the valve 18 can suitably be opened and closed by means of a start button 19 arranged on the torch nozzle, as shown on fig. 1.
  • the start button may also be used to start the arc by activating the electrical system of the plasma torch.
  • the start button 19 can be arranged on any available place on the portable plasma torch after the requirements in force for the use of such plasma torches.
  • FIG. 5 and 6 shows the cooling arrangement in accordence with a second embodiment.
  • This embodiment uses the same principle as in the first example, i.e. the use of the cold air flowing out of the compressed air source towards the torch nozzle and works in short as follows:
  • the electronic components with a need for cooling are mounted in a gas tight housing, where small cooling ribs can be mounted on the components in question.
  • Air is brought into the housing after the regulator, the air passes through the housing and out via a solenoid valve, leading the air further to the torch cable in the same way as in the first shown embodiment.
  • the solenoid valve is controlled by the activate button on the torch nozzle, also being decribed above.
  • the electronics are cooled by forced convection.
  • FIG. 5 shows a portable plasma torch 1 with the second embodiment of a cooling system according to the invention.
  • the plasma torch is provided with a carrying frame 2, harnesses 3, batteries 4 and a compressed air source 5 as described above.
  • Pressurized air or other gas under pressure is lead from the compressed air source 5 through a reduction valve 24 further through a gas channel 25 to an air pressure regulator 13 and further to a gas cable 14 leading the pressirized air or gas in to a cooling arrangement in the form of a cooling housing 6.
  • the pressurized air is then lead further from the cooling housing via a second gas cable 15 to the torch cable 19.
  • the plasma torch 1 is provided with a reduction valve 14, solenoid valve 18 and activate button 19, as described above in relation to the first example of embodiment.
  • FIG 6 shows, partly sectionally and with more details, the cooling arrangement according to the second embodiment.
  • Gas such as air
  • under pressure is led from the compressed air source via a reduction valve and gas cable (not shown) and further past the pressurised air regulator 13, through the first gas cable 14 and in through the inlet 20 to the cooling arrangement 12 in the form of a gas tight housing.
  • the gas tight housing 12 is partly taken away in figure 5 to show the components inside the housing.
  • Electronic components 16 with a need for cooling, as mentioned above, are arranged on a plate 22 such as for example a circuit board or print card 22.
  • the components 16 can furthermore optionally be provided with cooling ribs 23. Compressed air or pressurised gas flow over the cooling ribs and the electronic components in the housing 12, out of the outlet 21, through the second gas cable 15, past the relay controlled valve 18 to the torch cable 9 and further out of the torch nozzle (not shown).
  • Fig. 7 shows a perspective view of the cooling system according to a third embodiment.
  • Fig. 8 shows a perspective view of a fourth embodiment of the invention.
  • phase change materials as a cooling agent in the cooling arrangement. This is shown in the third and fourth embodiment.
  • a phase change material is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy. When thermal energy is withdrawn from a liquid or solid, the temperature falls. When heat energy is added the temperature rises. However, at the transition point between solid and liquid (the melting point), extra energy is required (the heat of fusion). To go from liquid to solid, the molecules of a substance must become more ordered.
  • PCMs are classified as latent heat storage units.
  • PCMs latent heat storage can be achieved through solid-solid, solid-liquid, solid-gas and liquid-gas phase change.
  • the normal phase change used for PCMs is the solid- liquid change.
  • PCMs are available in any required temperature range from -5 0 C up to 190 0 C .
  • materials that can be used as PCMs either organic materials, normally paraffin and fatty acids or inorganic materials, normally salt hydrates. In some cases organic and inorganic PCMs are combined.
  • a container 26 with PCM is connected to the electronic components 16 and the cooling plate.
  • the cooling plate is heated by the electronic components, parts of the heat will be absorbed by the container 26 as a further cooling means in addition to the radiator provided with cooled gas.
  • Fig. 8 shows a perspective view of a fourth embodiment of the invention.
  • the electronic components 16 are connected to one side of the container 26 containing PCM.
  • the PCM in the container will absorb energy in form of heat, thereby keeping an acceptable temperature for the electronic components.
  • the gas flowing from the gas cylinder towards the torch nozzle is led through a cooling loop passing over one side of the container 26, thereby absorbing heat from the container and keeping the temperature of the container down.
  • PCM PCM
  • a container of PCM will provide sufficiently cooling effect for the electronic components necessary to run the plasma torch.
  • PCM as cooling material in a plasma torch in addition to a cooling arrangement using low-temperature gas, one will obtain a highly efficient and compact overall cooling arrangement.
  • cooling ribs are arranged in the assumed direction of the air flow through the cooling arrangement in the form of an air chamber 12.
  • a rib arrangement of the type SKl 06 commersially available at the time of filing from Fischer elektronik, L ⁇ denscheid, Germany. These are extruded rib units with 7 ribs per 40 mm width and 27 mm height.
  • the ribs can also be arranged transverse to the assumed direction of flow or current, or in any angle between 0 and 180° to the direction of the flow. Neither must the ribs stand parallell, but can be arranged in any desired random or predefined pattern. If this is desirable, it is also possible to omit the ribs, so that the cold gas flows directly over the electronic components.
  • gastight cooling chamber or housing and distribute the electronic components with a need for cooling, in a number of chambers or housings, for example so that the ones with the highest need for cooling are arranged in a first housing, while components with a descending need are arranged in the following one or more housings before the gas is lead to the torch nozzle.
  • thermocontrolled valve can be arranged in the gas flow before the cooling arrangement, where the thermocontrolled valve at a given temperaure leads a part of the gas past the cooling arrangement through a third gas cable connected to the solenoid valve and/or further to the torch cable and the torch nozzle.
  • gas cylinders with other pressures can also be relevant, as long as the pressure is sufficiently high to provide the needed amount of gas. It can e.g. be cylinders from 300 bar and down towards 50 bar and even lower or, if desirable, cylinders with a higher pressure than 300 bar, i.e from 300 bar and up towards 600 bar and even higher, for example up to 1000 bar or more. It can also be used other types of cylinders than composite cylinder, such as steel cylinders, light metal cylinders, containers in fibre reinforced polymer materials and other.
  • a battery arrangement with a number of smaller connected units is shown as a power source.
  • the batteries can be of a rechargeable type or disposable batteries.
  • the power source can be any suitable compact transportable power source, and other poser sources such as a small compact light weight power generator, for example a generator made of components known from radio telecontrolled airplanes or the like, could also be used. This will also fall under the scope of the invention, as it is stated in the appended claims.
  • the container has an ignorable heat capacity. Thereby, it will not absorb any heat (in the real world steel containers are often used and they have a high heat capacity).
  • the experiment with a gas container as described above and lowered into water was performed by Joule. The temperature of the water before and after the expansion was measured and there was not registered any changes. In retrospect, you could say that the precision of the measurements was not very high, but it indicates at least the result expected from an ideal gas. Generally, we have the inner energy preserved
  • the temperature remains the same before and after expansion. This will not necessarily relate to a real gas.
  • Van der Waal introduced the following emprical equation for a real gas:
  • Heat capacity c v is only a function of temperature for a van der Waal gas.
  • ⁇ is the volume expansion coefficient.
  • Ti can be decided from the measured quantities p ⁇ , T 2 , p 2 .
  • T ⁇ for measured/ ⁇ on the isenthalpic curve passing through (p 2 , T 2 ), see Diagram 1.
  • Diagram 1 Isenthalpic curve through thepointt (-3 0 C, 20 Bar). The curve applies for air
  • Air is a compressible medium.
  • the present difference in temperature is of minimal significance for the result.
  • the heat capacity C for the gas is 5 times higher at 10 bar than at 2 bar.
  • AT AQ/C. Since
  • « T we can write AT 2bar lA ⁇ mar ⁇ Ciobar I C 2 bar 5. Consequently we can expect a higher temperature at 2 barthan at 10 bar provided that there is a heat transport to the surrounding components. Both temperatures are higher than the ideal temperature ⁇ ad resulting from adiabatic conditions.
  • Diagram 4 Measured temperature and pressure development for a composite cylinder and cable
  • Air is normally cinsidered as a gas mixture of about 80% N 2 and about 20% O 2 or 100% N 2 .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
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  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Arc Welding In General (AREA)
  • Plasma Technology (AREA)

Abstract

La présente demande se rapporte à une torche à plasma portative (1), comprenant un ensemble de support portatif (3), une source d'alimentation et une source d'air comprimé (5). La source d'air comprimé (5) et le boîtier électronique sont montés sur l'ensemble de support (3). La torche à plasma est en outre pourvue de moyens de mise à la terre (7, 8) et d'un ensemble torche (9, 10). Le refroidissement des composants électroniques dans le boîtier électronique est effectué par le transfert de chaleur vers un second milieu, tel qu'un milieu gazeux, liquide, solide ou à changement de phase.
PCT/NO2010/000052 2009-02-11 2010-02-11 Système de torche à plasma portative pourvu d'un système de refroidissement utilisant un second milieu, pour composants électroniques Ceased WO2010093256A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20090642A NO329602B1 (no) 2009-02-11 2009-02-11 Baerbar plasmabrenner
NO20090642 2009-02-11

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WO2010093256A1 true WO2010093256A1 (fr) 2010-08-19

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WO2013076373A1 (fr) * 2011-11-23 2013-05-30 Kemppi Oy Dispositif de soudage et/ou de coupe fonctionnant sur batterie et structure de refroidissement
CN106001877A (zh) * 2016-07-19 2016-10-12 上海通用重工集团有限公司 空气等离子割机
CN106888545A (zh) * 2011-08-19 2017-06-23 伊利诺斯工具制品有限公司 等离子体喷枪与具有人体工程学特征的喷枪手柄

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WO2009079110A1 (fr) * 2007-12-19 2009-06-25 Illinois Tool Works Inc. Système de découpage au plasma avec un compresseur et un déshumidificateur ; procédé de déshumidification d'un gaz comprimé avant alimentation du gaz à un chalumeau ; procédé de fabrication d'un tel système de découpage au plasma ; système pour une unité de chalumeau

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JPH08275549A (ja) * 1995-03-31 1996-10-18 Sansha Electric Mfg Co Ltd 電源装置
US20040240178A1 (en) * 2003-05-29 2004-12-02 Lg Electronics Inc. Cooling system for a portable computer
US20050000946A1 (en) * 2003-07-02 2005-01-06 Bruce Albrecht Welder with integrated gas bottle
WO2007028185A2 (fr) * 2005-09-09 2007-03-15 Fronius International Gmbh Chalumeau de soudage, tete de soudage, buse a gaz et tube de contact, ainsi que procede de commande de processus pour un poste de soudage
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WO2009036015A2 (fr) * 2007-09-10 2009-03-19 Hypertherm, Inc. Système autonome et portable de traitement de matériaux
WO2009079110A1 (fr) * 2007-12-19 2009-06-25 Illinois Tool Works Inc. Système de découpage au plasma avec un compresseur et un déshumidificateur ; procédé de déshumidification d'un gaz comprimé avant alimentation du gaz à un chalumeau ; procédé de fabrication d'un tel système de découpage au plasma ; système pour une unité de chalumeau

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106888545A (zh) * 2011-08-19 2017-06-23 伊利诺斯工具制品有限公司 等离子体喷枪与具有人体工程学特征的喷枪手柄
WO2013076373A1 (fr) * 2011-11-23 2013-05-30 Kemppi Oy Dispositif de soudage et/ou de coupe fonctionnant sur batterie et structure de refroidissement
US9308605B2 (en) 2011-11-23 2016-04-12 Kemppi Oy Battery-operated welding and/or cutting device and a cooling profile
CN106001877A (zh) * 2016-07-19 2016-10-12 上海通用重工集团有限公司 空气等离子割机

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