EP4363149A1 - Procédé de coupage de pièces au jet de plasma - Google Patents

Procédé de coupage de pièces au jet de plasma

Info

Publication number
EP4363149A1
EP4363149A1 EP22765421.7A EP22765421A EP4363149A1 EP 4363149 A1 EP4363149 A1 EP 4363149A1 EP 22765421 A EP22765421 A EP 22765421A EP 4363149 A1 EP4363149 A1 EP 4363149A1
Authority
EP
European Patent Office
Prior art keywords
plasma
cutting
torch
workpiece
gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22765421.7A
Other languages
German (de)
English (en)
Inventor
André PÖTSCH
Thomas Steudtner
Volker Krink
René Nogowski
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.)
Kjellberg Stiftung
Original Assignee
Kjellberg Stiftung
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
Priority claimed from DE102021005500.4A external-priority patent/DE102021005500B4/de
Application filed by Kjellberg Stiftung filed Critical Kjellberg Stiftung
Publication of EP4363149A1 publication Critical patent/EP4363149A1/fr
Pending legal-status Critical Current

Links

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
    • 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
    • B23K10/003—Scarfing, desurfacing or deburring
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • B23K2103/05—Stainless steel
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof

Definitions

  • the invention relates to a method for plasma cutting of workpieces, in particular for hole cutting.
  • Plasma is a thermally highly heated, electrically conductive gas that consists of positive and negative ions, electrons, and excited and neutral atoms and molecules.
  • gases e.g. the monatomic argon or helium and/or the diatomic gases hydrogen, nitrogen, oxygen or air are used as the plasma gas. These gases ionize and dissociate with the energy of the plasma arc.
  • the parameters of the plasma jet can be greatly influenced by the design of the nozzle and electrode. These parameters of the plasma jet are z. B. the jet diameter, the temperature, energy density and the flow rate of the gas.
  • the plasma is constricted by a nozzle that can be gas or water-cooled.
  • the nozzle has a nozzle bore through which the plasma jet flows.
  • energy densities of up to 2 ⁇ 10 6 W/cm 2 can be achieved.
  • Temperatures of up to 30,000°C occur in the plasma jet, which, in conjunction with the high flow rate of the gas, result in very high cutting speeds on all electrically conductive materials.
  • Plasma cutting is now an established process for cutting electrically conductive materials, with different gases and gas mixtures being used depending on the cutting task.
  • Plasma torches typically have a plasma torch body in which an electrode and a nozzle are mounted. The plasma gas flows between them and exits through the nozzle bore. Most of the time, the plasma gas is fed through a gas duct between attached to the electrode and the nozzle, guided and can be made to rotate. Modern plasma torches also have a supply for a secondary medium, either a gas or a liquid. The nozzle is then surrounded by a secondary gas cap. In liquid-cooled plasma torches in particular, the nozzle is fixed by a nozzle cap, as described in DE 10 2004 049 445 A1, for example. The cooling medium then flows between the nozzle cap and the nozzle.
  • the secondary medium then flows between the nozzle or the nozzle cap and the secondary gas cap and emerges from the bore of the secondary gas cap. It affects the plasma jet formed by the arc and plasma gas. It can be set in rotation by a gas guide arranged between the nozzle or nozzle cap and the secondary gas cap.
  • the secondary gas cap protects the nozzle and nozzle cap from the heat or ejected molten metal of the workpiece, especially when the plasma jet pierces the material of the workpiece to be cut. It also creates a defined atmosphere around the plasma jet when cutting.
  • air, oxygen or nitrogen or a mixture thereof are usually used as plasma gases.
  • Air, oxygen or nitrogen or a mixture thereof are also usually used as secondary gases, with the composition and volume flows of the plasma gas and the secondary gas usually being different, but they can also be the same.
  • the plasma gases usually used are nitrogen, argon, an argon-hydrogen mixture, a nitrogen-hydrogen mixture or an argon-hydrogen mixture -nitrogen mixture used.
  • air can also be used as the plasma gas, but the oxygen content in the air leads to oxidation of the cut surfaces and thus to a deterioration in the cut quality.
  • Nitrogen, argon, an argon-hydrogen mixture, a nitrogen-hydrogen mixture or an argon-hydrogen-nitrogen mixture are also usually used as the secondary gas, with the composition and volume flows of the plasma gas and the secondary gas usually being different. but can also be the same.
  • the feed rate v is intended here to mean the speed at which a plasma torch is moved relative and parallel to a workpiece surface. It happens usually by a guidance system, e.g. by a CNC-controlled coordinate guidance machine or a robot.
  • FIGS. 1 and 2 Conventional arrangements for plasma cutting are shown in FIGS. 1 and 2 as a schematic example.
  • An electrical cutting current flows from a power source 1.1 of a plasma cutting system 1 via a line 5.1 to a plasma cutting torch 2 via its electrode 2.1 a plasma jet 3 constricted by a nozzle 2.2 and a nozzle opening 2.2.1 to a workpiece 4 and then via a line 5.3 back to the Power source 1.1.
  • the plasma cutting torch 2 is supplied with gas via lines 5.4 and 5.5 from a gas supply 6 to the plasma cutting torch 2 .
  • the plasma cutting system 1 there is a high-voltage ignition device 1.3, a pilot resistor 1.2, a power source 1.1 and a switching contact 1.4 and their control device (not shown). Valves for controlling the gases can also be present, but these are not shown here.
  • the plasma cutting torch 2 essentially consists of a plasma torch body 2.7 with a beam generation system comprising the electrode 2.1, the nozzle 2.2 and a gas supply 2.3 for plasma gas PG.
  • the plasma torch body 2.7 continues to supply the media (gas, cooling water and electricity).
  • the electrode 2.1 of the plasma cutting torch 2 is usually a non-consumable electrode 2.1, which essentially consists of a high-temperature material such as tungsten, zirconium or hafnium and therefore has a very long service life.
  • the electrode 2.1 often consists of two interconnected parts, an electrode holder 2.1.1, which is made of a material that conducts electricity and heat well (e.g. copper, silver, alloys thereof), and a high-melting emission insert 2.1.2 with a low electron work function (such as hafnium, zirconium, tungsten).
  • the nozzle 2.2 usually consists of copper and constricts the plasma jet 3.
  • a gas duct 2.6 for the plasma gas PG, which causes the plasma gas to rotate, can be arranged between the electrode 2.1 and the nozzle 2.2.
  • the part of the plasma cutting torch 2 from which the plasma jet 3 emerges from the nozzle 2.2 is referred to as the plasma torch tip 2.8.
  • the distance between the plasma torch tip 2.8 and the workpiece surface 4.1 is denoted by d.
  • a secondary gas cap 2.4 for supplying a secondary medium for example a secondary gas SG
  • a secondary gas cap 2.4 for supplying a secondary medium, for example a secondary gas SG
  • the combination of secondary gas cap 2.4 and secondary gas SG protects the nozzle 2.2 from damage when the plasma jet 3 pierces the workpiece 4 and creates a defined atmosphere around the plasma jet 3.
  • a gas guide 2.9 Between the nozzle 2.2 and The secondary gas cap 4 is a gas guide 2.9, which can set the secondary gas SG in rotation.
  • the location of the plasma cutting torch 2 from which the plasma jet 3 emerges from the secondary gas cap 2.4 is referred to as the plasma torch tip 2.8.
  • the distance between the plasma torch tip 2.8 and the workpiece surface 4.1 is also denoted.
  • a pilot arc is first ignited between the electrode 2.1 and the nozzle 2.2 with a low electrical current (e.g. 10 A - 30 A) and therefore low power, e.g. by means of high electrical voltage generated by the high-voltage ignition device 1.3.
  • the current (pilot current) of the pilot arc flows through the line
  • This low-energy pilot arc prepares the distance between the plasma torch tip 2.8 and the workpiece 4 for the cutting arc through partial ionization. If the pilot arc touches the workpiece 4, it occurs due to the electrical potential difference between the nozzle generated by the electrical resistor 1.2
  • the plasma cutting torch 2 is moved with a guide system (not shown) relative to a workpiece 4 or its surface 4.1.
  • a guide system (not shown) relative to a workpiece 4 or its surface 4.1.
  • This can e.g. B. be a robot or a CNC-controlled guide machine.
  • the control device of the guidance system communicates with the arrangement according to Figure 1 or 2.
  • the control device of the management system starts and ends the operation of the plasma cutting torch 2.
  • a large number of signals and information e.g. B. about operating states and data, as only ON and OFF between the control device of the management system and the plasma cutting system.
  • High cutting qualities can be achieved with plasma cutting. Criteria for this are, for example, a low squareness and inclination tolerance according to DIN ISO 9013. When adhering to the optimal cutting parameters, these include, among other things, the electric cutting current, the cutting speed, the distance between the plasma cutting torch and the workpiece and the gas pressure, smooth cut surfaces and dross-free edges can be achieved.
  • a typical cutting task for plasma cutting is cutting out one or more contours from a workpiece.
  • the workpiece 4 before the contour is cut, the workpiece 4 must be pierced and pierced through.
  • the plasma cutting torch 2 is positioned with a distance d1 between the torch tip 2.8 and the workpiece surface 4.1, as shown by way of example in FIG. 3, and the pilot arc 3.1 is ignited, as shown by way of example in FIG. d1 must usually be selected in such a way that the pilot arc reaches the workpiece surface and the arc can “translate” from the nozzle to the workpiece and the plasma jet can form towards the workpiece.
  • part of the melted material 418 of the workpiece 4 sprays past the nozzle 2.2, the secondary gas cap 2.4 and the plasma torch tip 2.8 or the plasma cutting torch 2. Nevertheless, part of the high-splashing material remains, which, particularly in the case of greater sheet metal thicknesses, splashes against the components mentioned and damages them. Attempts are also made to guide the plasma cutting torch 2 in the direction of the contour to be cut out parallel to the workpiece surface 4.1 at a lower speed than the cutting speed in order to keep the spattering material away from the plasma cutting torch and the components mentioned.
  • the melted material squirts out of the underside of the workpiece 4.5 and it can be cut.
  • the present invention is therefore based on the object of avoiding, but at least reducing, damage to a plasma torch, a plasma torch tip, in particular a nozzle, a nozzle opening and/or a secondary gas cap when piercing a workpiece by high-splashing molten hot material, in order in particular also in to be able to pierce larger sheet metal thicknesses safely.
  • this object is achieved by a method according to claim 1.
  • the rinsing can also be referred to as a trough or indentation.
  • the present invention is based on the surprising finding that by producing a flushing on a workpiece surface before piercing into and through the workpiece, e.g. by parameters that deviate from the cutting, with which the plasma cutting torch is operated or moved, piercing into and through is opposed the prior art thicker material can be done safely.
  • 2 shows a further arrangement for plasma cutting according to the prior art
  • 3 shows an example of the process of positioning a plasma cutting torch during plasma cutting
  • FIG. 5 by way of example the process of piercing a plasma jet during plasma cutting
  • 6 to 13 show details of a method for plasma cutting of workpieces according to a particular embodiment of the present invention
  • FIG. 14 shows time curves for plasma torch distance and advance speed according to a special embodiment of the present invention
  • 15 shows the time curves of plasma torch distance and advance speed according to a further special embodiment of the present invention.
  • the piercing process up to the final piercing into and through the workpiece for mild steel with a material thickness 4.3 of 60 mm and a cutting current I4 of 300 A, for example, is explained as an example.
  • the feed rate v4 of the plasma cutting torch 2 is 300 mm/min, for example, and the plasma torch distance d4 is 7 mm, for example.
  • oxygen is used as the plasma gas PG, for example, and air, for example, is used as the secondary gas SG.
  • the kerf width 452 of the kerf 450 produced during cutting is approximately 6.5 mm.
  • the piercing process can essentially be divided into 4 phases, for example.
  • Phase 1 Positioning the plasma torch, igniting the pilot arc and initiating the main arc
  • Phase 2 Rinsing the workpiece from the workpiece surface
  • Phase 3 Plunging into and through the workpiece
  • Stage 4 Cutting The phases can merge directly into one another and even partially overlap. However, transition processes between the phases and, in principle, further and/or alternative phases are also possible.
  • FIG. 6 shows an example of how a plasma torch 2 with a plasma torch distance d1 of 9 mm, for example, is positioned between a plasma torch tip 2.8 and a workpiece surface 4.1 (phase 1).
  • d1 must usually be selected in such a way that the pilot arc reaches the workpiece surface and the arc can “translate” from the nozzle to the workpiece and the plasma jet can form towards the workpiece.
  • FIG. 7 shows that a pilot arc 3.1 has been ignited. This initially burns between an electrode 2.1 and a nozzle 2.2 (not shown here, see FIGS. 1 and 2) with, for example, 25 A (phase 1).
  • the current is increased to the cutting current of 300 A, for example.
  • the feed rate v with which the plasma cutting torch 2 is moved relative to the workpiece surface 4.1 in the feed direction 10, is increased from v1 of, for example, 0 mm/min to v2 of, for example, 2,800 mm/min. This is advantageously significantly greater than the feed rate v4 during cutting (phase 4).
  • the shape of the contour 430, which the plasma torch 2 describes in relation to the workpiece surface 4.1, seen from above onto the workpiece surface 4.1, with the feed speed v2, is in this case an oval contour 430 with a size of, for example, approx. 48 mm ⁇ 8 mm ( Figure 9b).
  • the feed speed v2 and the plasma torch distance d2 are so great that the molten material 418 spraying up from the workpiece surface 4.1 squirts away laterally in such a way that it does not affect the plasma cutting torch 2, the nozzle 2.2, a secondary gas cap 2.4 and the plasma torch tip 2.8, or only to a very small extent Share touches that they are not damaged, as shown in Figure 9a (phase 2). In this example, this is achieved in particular through the combination of the described parameters v2 and d2. Only material is removed. The plasma cutting torch is advantageously moved so quickly (v2) and is sufficiently far away (d2) that the melted material sprays away to the side. You can also imagine that the plasma beam is deflected against the direction of feed due to the rapid movement. The melted material then also sprays in this direction. Overall, one could also say that the energy input into the surface per unit length (mm) is advantageously smaller than when cutting.
  • Figure 9b shows the oval contour 430 described by the plasma cutting torch 2 in a plan view of the workpiece surface 4.1.
  • This is circumvented twice here, for example, and the result is a flushing 410, which is also shown, with a maximum length 419 of, for example, approx. 57 mm and a width 420 of 17 mm, for example.
  • the washout 410 has an oval shape 415 with a peripheral edge 413 at the transition between the washout 410 and the workpiece surface 4.1.
  • the distance 417 of the deepest point of the flushing 410, measured perpendicularly (i.e. according to the right-angled coordinate system drawn in the figures in the z-direction) to the workpiece surface 4.1, is 25 mm here, for example (phase 2).
  • the smallest distance 411 between the edge 413 of the resulting flushing 410 and the oval contour 430 described by the plasma cutting torch 2 is, for example, approx. 4.5 mm
  • the distance 412 of the longitudinal edges of the oval contour 430 described by the plasma cutting torch 2 is, for example, 8 mm.
  • the distance 411 is smaller than the distance 412 and the distance 412 is smaller than twice the distance 411.
  • FIG. 10 shows the plasma cutting torch 2 shortly after leaving the circumnavigation of the contour 430. It has been moved in the direction of the edge 413 of the flushing 410 for, for example, approx. 2 mm and positioned in such a way that the plasma jet 3 is at least partially on the edge 413 and/or or meets the slope 421 of the washout 410.
  • the feed rate v3 is significantly lower than the feed rate v2 during removal.
  • the length 419 of the flushing 410 is so great that the material 418 spraying up until it pierces can spray away through the flushing 410 in the opposite direction to the cutting direction 10 in such a way that it does not damage the plasma cutting torch 2, the plasma torch tip 2.8, the nozzle 2.2 and/or the secondary gas cap 2.4 or mostly untouched.
  • the washout 410 should advantageously be so large that the high Feed speed v2 can "fly through" molten material 418 that is splashing up laterally between the plasma cutting torch 2 and its components (nozzle 2.2, secondary gas cap 2.4, plasma torch tip 2.8) and the edge 413 and the slope 421 of the flushing 410. If the flushing is too small, the material spraying up hits the opposite part of the edge 413 and the slope 421 of the flushing 410 and can be deflected or deflected back in the direction of the plasma cutting torch 2 .
  • the plasma torch distance d3 is chosen to be 25 mm, equal to the plasma torch distance d2 during removal.
  • the plasma torch distance d3 is greater than the plasma torch distance d4 during cutting (phase 4).
  • the feed speed v4 selected for cutting e.g. 60 mm mild steel and the plasma torch distance d4 can be adjusted in order to carry out the cutting process in which a kerf 450 with a kerf width 452 is created (phase 4).
  • Figure 11 shows the plasma cutting torch 2 immediately after piercing through the workpiece
  • Figure 12 shows the plasma cutting torch during cutting
  • Figure 13 shows the top view of the workpiece surface 4.1 and the kerf 450 and flushing 410 created by the plasma cutting torch 2 (representation without plasma cutting torch 2).
  • the melted material 423 squirts out of the underside of the workpiece 4.5.
  • Figures 14 and 15 show an example of the schematic sequence of the plasma torch distance (d, d1, d2, d3, d4) and the feed speed (v, v1, v2, v3, v4) of the plasma cutting torch 2 during the temporal phases 1, 2, 3 and 4 shown.
  • FIG. 15 also shows that between phases 1, 2, 3 and 4 there can be at least one further phase. This can also just be the transition between two parameters, e.g. v1 and v2, v2 and v3, v3 and v4 and/or d1 and d2, d2 and d3, d3 and d4. In practice, this will usually be the case because the "abrupt" transitions shown in Figure 14 do not exist in this form. However, additional longer phases can also be intentionally present.
  • phase 5 with a time t5 can be provided in particular between phase 3 and phase 4, in which the plasma torch distance d5 and/or the feed speed d5 differs from that/those of phases 3 and 4.
  • the plasma torch distance d5 and/or the feed speed d5 differs from that/those of phases 3 and 4.
  • the current I can be "0", for example.
  • the vector of the feed rate can, in principle, in addition to a component parallel to the workpiece surface, i.e. H. in the right-angled coordinate system drawn in the figures, from which the y-axis runs into the plane of the drawing (perpendicular), in the x-y plane, also have a component (z-component) perpendicular to the workpiece surface. This would then cause the parameter d to change.
  • a higher feed rate v2 than feed rate v4 during cutting and a higher plasma torch distance d2 than plasma torch distance d4 during cutting were selected for removing or generating flushing 410 (phase 2).
  • the current I2 advantageously has the same magnitude as the cutting current I4 during cutting.
  • phase 2 it is possible to work with the following parameters that have changed compared to cutting (phase 4):
  • the oxidizing fraction means the volume percentage of oxidizing gas, for example oxygen or carbon dioxide, in the plasma gas or secondary gas.
  • the reducing proportion means the proportion by volume of reducing gas, for example hydrogen or methane, in the plasma gas or secondary gas.
  • Rinsing is moved in phase 2: oval, 35 mm x 6 mm, circled twice
  • Shape and size (max. length 419 x width 420) of the resulting washout 410 oval, approx. 43 mm x 14 mm
  • Rinsing is moved in phase 2: oval, 48 mm x 8 mm, circled 2x
  • Shape and size (max. length 419 x width 420) of the resulting washout 410 oval, approx. 57 mm x 17 mm
  • Rinsing is moved in phase 2: oval, 48 mm x 8 mm, circled 2x
  • Shape and size (max. length 419 x width 420) of the resulting washout 410 oval, approx. 57 mm x 17 mm
  • Plasma gas Argon-hydrogen mixture
  • Rinsing is moved in phase 2: oval, 40 mm x 6 mm, circled 2x
  • Shape and size (max. length 419 x width 420) of the resulting washout 410 oval, approx. 45 mm x 11 mm
  • Plasma gas Argon-hydrogen mixture
  • Rinsing is moved in phase 2: oval, 60 mm x 6 mm, circled 3x
  • Shape and size (max. length 419 x width 420) of the resulting washout 410 oval, approx. 65 mm x 11 mm
  • Plasma gas Argon-hydrogen mixture
  • Rinsing in phase 2 is moved: oval, 40 mm x 6 mm, 1x circumnavigated
  • Shape and size (max. length 419 x width 420) of the resulting washout 410 oval, approx. 50 mm x 15 mm
  • Plasma gas Argon-hydrogen mixture
  • Rinsing in phase 2 is moved: oval, 60 mm x 6 mm, 1x circumnavigated
  • Shape and size (max. length 419 x width 420) of the resulting washout 410 oval, approx. 62 mm x 8 mm
  • Plasma gas Argon-hydrogen mixture
  • Rinsing in phase 2 is moved: oval, 60 mm x 8 mm, 1x circumnavigated
  • Shape and size (length 419 x width 420) of the resulting washout 410 oval, ca. 66 mm x 14 mm
  • phase 4 plasma gas p1 plasma gas pressure p11 plasma gas pressure in phase 1 p12 plasma gas pressure in phase 2 p13 plasma gas pressure in phase 3 p14 plasma gas pressure in phase 4 p2 secondary gas pressure p21 secondary gas pressure in phase 1 p22 secondary gas pressure in phase 2 p23 secondary gas pressure in phase 3 p24 secondary gas pressure in phase 4

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

L'invention concerne un procédé de coupage de pièces au jet de plasma, selon lequel on utilise au moins une torche de coupage au jet de plasma au moins pourvue d'un corps de torche à plasma, d'une électrode et d'une buse qui comporte un orifice à travers lequel s'écoule au moins un gaz plasma ou un mélange de gaz plasma et qui étrangle le jet de plasma. Selon l'invention, un creusement (410) est réalisé avant que le jet de plasma ne pénètre dans la pièce et la traverse, en exposant la pièce au jet de plasma à partir de sa surface au moins pendant une durée t2, de telle sorte que de la matière de la pièce soit enlevée à partir de la surface de ladite pièce et que le creusement (410) se forme.
EP22765421.7A 2021-08-16 2022-08-09 Procédé de coupage de pièces au jet de plasma Pending EP4363149A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102021004182 2021-08-16
DE102021005500.4A DE102021005500B4 (de) 2021-08-16 2021-11-08 Verfahren zum Plasmaschneiden von Wertstücken
PCT/EP2022/072339 WO2023020893A1 (fr) 2021-08-16 2022-08-09 Procédé de coupage de pièces au jet de plasma

Publications (1)

Publication Number Publication Date
EP4363149A1 true EP4363149A1 (fr) 2024-05-08

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EP22765421.7A Pending EP4363149A1 (fr) 2021-08-16 2022-08-09 Procédé de coupage de pièces au jet de plasma

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EP (1) EP4363149A1 (fr)
WO (1) WO2023020893A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0635068B2 (ja) * 1986-06-20 1994-05-11 株式会社田中製作所 プラズマ切断法
DE69800465T2 (de) * 1998-10-22 2001-06-07 La Soudure Autogene Francaise, Paris Verfahren und automatische Vorrichtung zum Signieren durch Plasma, insbesondere von Metallen
DE202004021663U1 (de) 2004-10-08 2010-05-12 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh Plasmabrenner
DE102009053175B4 (de) * 2009-10-30 2015-01-29 Kjellberg Finsterwalde Plasma Und Maschinen Gmbh Verfahren zur Ausbildung von Markierungen auf Oberflächen von Werkstücken mit einem Plasmabrenner
FR3020584B1 (fr) * 2014-05-02 2016-12-23 Air Liquide Welding France Procede et installation de coupage par plasma d'arc avec cycle de percage ameliore

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WO2023020893A1 (fr) 2023-02-23

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