CA1065022A - Method and device for controlling an electric arc by rotating magnetic field - Google Patents
Method and device for controlling an electric arc by rotating magnetic fieldInfo
- Publication number
- CA1065022A CA1065022A CA244,830A CA244830A CA1065022A CA 1065022 A CA1065022 A CA 1065022A CA 244830 A CA244830 A CA 244830A CA 1065022 A CA1065022 A CA 1065022A
- Authority
- CA
- Canada
- Prior art keywords
- arc
- torch
- sleeve
- magnetic field
- rotation
- 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.)
- Expired
Links
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
- H05H1/40—Details, e.g. electrodes, nozzles using applied magnetic fields, e.g. for focusing or rotating the arc
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/06—Arrangements or circuits for starting the arc, e.g. by generating ignition voltage, or for stabilising the arc
- B23K9/073—Stabilising the arc
- B23K9/0737—Stabilising of the arc position
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/08—Arrangements or circuits for magnetic control of the arc
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Arc Welding Control (AREA)
- Arc Welding In General (AREA)
- Plasma Technology (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The disclosure herein describes an apparatus and a method for cutting, eroding, welding or depositing metallic or non-metallic materials by means of an electric arc which is made to rotate by submitting it to a rotating magnetic field; the path of at least one end of the arc is controlled by automatic means in order to vary at will the speed of rotation of the arc and the radius, i.e. the distance of the route of the arc to the center of rotation, in order that this route sweeps a surface, the shape of which can be rectangular, circular, elliptic or any other.
The disclosure herein describes an apparatus and a method for cutting, eroding, welding or depositing metallic or non-metallic materials by means of an electric arc which is made to rotate by submitting it to a rotating magnetic field; the path of at least one end of the arc is controlled by automatic means in order to vary at will the speed of rotation of the arc and the radius, i.e. the distance of the route of the arc to the center of rotation, in order that this route sweeps a surface, the shape of which can be rectangular, circular, elliptic or any other.
Description
10~50'~;~
The invention relates to the cutting, eroding, welding and depositing of metallic and non-metallic materials by means of electric arcs.
Some known arc welding devices have a d.c. or an a.c. electromagnet producing a magnetic field to impart a rectilinear oscillating movement to the arc. These known devices were designed to replace the previous mechanical means for rocking the torch to make the arc oscillate along a rectilinear path. In other known arc welding devices the arc is made to turn by submitting it to a turning magnetic field.
According to the invention there is provided a method of cutting, eroding, welding or depositing a metallic or non-metallic material by means of an electric arc that is made to turn by submitting it to a turning magnetic field, comprising controlling the trajectory and the speed of at least one of the ends of the arc.
The invention also proposes a device for carrying out such a method comprising means for producing, in the proximity of the arc, a turning magnetic field acting on the arc to make it turn, and means for controlling the trajectory and the speed of at least one of the ends of the arc.
It can be seen that the invention is distinguished from the aforementioned known methods and devices in that the ~-path and the rotational speed of the arc are controlled. The important advantages that this involves will be mentioned later.
The accompanying drawings show, by way of example, several embodiments of devices according to the invention, illustrating several manners of carrying out the method. In the drawings:
Fig. 1 is an axial cross-section of a magnetic ......
:, z armature, in cross-section along line 1-1 of Fig. 2;
Fig. 2 is a plan view of the armature of Fig. l;
Fig. 3 is an axial cross-section of a first embodi-ment of device, namely a torch surrounded by the armature of Figs. 1 and 2;
Fig. 4 is an overall schematic diagram of the first embodiment of device;
Fig. 5 is an axial cross-section of a second embodi-ment;
lQ Fig. 6 is an axial cross-section of a third embodi-ment; and Fig. 7 is an axial cross-section of a fourth embodi-ment.
The embodiment of Figs. 1 to 3 comprises a plasma torch of the non-transferred arc type having a refractory sleeve 1 in which is disposed an electrode 2 connected to the negative terminal of a supply. Electrode 2 is fixed at a closed end 3 of sleeve 1. At its opposite end, the sleeve 1 has, as is known, a second electrode 4 formed by a metal piece 2Q with an axial bore 5. This second electrode 4 is connected to the positive terminal of the supply to produce an arc 6 between the free end of electrode 2 and an inner conical part 7 of electrode 4.
The electrode 2 has an axial duct 8 through which a gas is fed and the wall of sleeve 1 also has an orifice 9 for the supply of gas. These gases may, according to the case, be chosen to provide cooling, chemical protection or to produce desired arc characteristics (i.e. be ionizable, dissociable).
The gases are discharged as a plasma by bore 5 and act, as is 3Q known, on a workpiece 30 (Fig. 4). All that has just been described is known. The device additionally has an annular - . . .. .
10~50'~'~
magnetic armature 10 having three arms 11, 12, 13 about each of which is disposed a respective winding 14, 15, 16. The arms 11, 12, 13 each terminate with a pole piece 17, 18, 19 disposed in star configuration angularly spaced at 120 to one another, as shown on Fig. 2. The armature 10 with its windings 14, 15, 16 surrounds the sleeve 1, as shown in Fig.
3. The pole pieces (of which only one, 17, is visible on Fig.
3) are disposed adjacent to and facing the region in sleeve 1 where the arc 6 is produced.
The three windings are each fed by one of the phases of a triphase current in a manner to produce a turning magnetic field. When the windings 14, 15, 16 are supplied with triphase current, the turning magnetic field produced by the pole pieces 17, 18, 19 acts on arc 6 and causes it to turn about the axis of the torch.
This rotation of the arc has the advantage of ensuring an absolutely homogeneous distribution of energy, which favorizes cooling of the electrodes 2 and 4 and conse-quently enables a reduction of their dimensions.
Fig. 4 schematically shows the overall device, i.e.
the torch of Fig. 3 with its means for supplying and for con-trolling rotation of the arc. On this figure, the current source supplying arc 6 is designated by 20, and 21 designates the installation for supplying polyphase current (triphase, in the example given) to windings 14, 15, 16. Installation 21 comprises a variable-frequency pilot generator 22, a polyphase current generator 23 piloted by generator 22, and three amplifiers 24, 25, 26 supplying current to the windings 14, 15, 16. Amplifiers 24, 25, 26 are controlled by an amplitude-adjusting unit 27 servo-controlled by a pulse generator 28 itself controlled by pilot generator 22. Unit 29 is a .
o~
frequency control unit and 30 designates the metallic or non-metallic workpiece.
In relation to devices with a direct supply from an industrial (mains) polyphase networ]c, the described device has the great advantage of enabling several frequencies to be set at will.
Fig. 5 shows a torch with a transferred plasma arc.
The torch is of analogous construction to that of Fig. 3, except that negative electrode 31 is solid and piece 32, equivalent to 4 of Fig. 3, no longer forms the positive electrode but acts as means for constricting the arc 33, the workpice 34 being connected to the positive terminal of the supply. The electromagnetic means for rotating the arc are analogous to those of Figs. 1 to 3, but with the following differences: the armature 35 with arms such as 36 and windings such as 37, 38 arranged in star-configuration as in the first embodiment are disposed about the refractory sleeve 39 in such a manner that the pole pieces (of which two, 41, 42, are visible) are adjacent bore 42 of piece 32, in the -~
region between piece 32 and the workpiece 34. With this arrangement, the turning magnetic field produced by the pole -pieces acts on part of arc 33 outside the torch and makes it turn as indicated by arrow 43.
Fig. 6 shows a torch of the so-called "TIG" type operating with a gaseous flux and a refractory electrode. The refractory electrode 44 is disposed axially in a refractory sleeve 45, with a free end of the electrode engaged in an opening 46 at one of the ends of sleeve 45. An arc 48 is produced between the point of electrode 44 and a workpiece 47.
Arrow 49 indicates how the arc 48 turns under the effect of the turning magnetic field produced by three pole pieces of -. - , . : : :.: ~.. - . .. . : .
106~22 which only two, 50, 51, are visible. The electromagnetic means for rotating the arc are identical to those described with reference to Fig. 5.
Fig. 7 shows a fusible-electrode torch operating with gaseous flux. In a refractory sleeve 52 is axially disposed a metal tube 53 connected to the positive terminal of the arc supply. Tube 53 guides an electrode-forming fusible metal wire 54 which is progressively unwound from a spool 55 in operation of the device. Sleeve 52 has a central opening 56 at its end opposite that to which tube 53 is fixed. The means for rotating the arc are the same as those of Figs. 5 and 6, and comprise three pole pieces disposed at 120 (of which two, 57, 58 are shown) and acting on the arc 59 passing between the end 60 of fusible electrode 54 and the workpiece 61 which is connected to the negative terminal of the arc supply. Arrow 62 indicates the rotational movement of arc 59 under the action of the turning field.
In operation, drops 63 of metal from the fusible electrode 60 are deposited on piece 61.
2Q By associating the various described devices with a control installation such as 21 of Fig. 4, it is possible to control the energy density transmitted to the workpiece and, moreover, when a fusible electrode is employed, the transfer to the workpiece can be controlled. The turning magnetic field can be regulated in amplitude and speed of rotation, in a periodic or non-periodic manner, by the supply voltage and frequency, and by the arrangement of the windings. By varying, as a function of time, the supply voltage and fre-quency either separately or simultaneously, it is possible to 3Q obtain arc pulsation effects which are rendered perfectly con-trollable. It is hence possible on an area of the workpiece - 5 - ~-. . : :
. : . , . .: .:: . .
. ~
- .
.,. . , , , : .- : . .: ~: . , ~ : . .
.. . . , , , .. :
delimited by an external contour corresponding to the greatest amplitude of the arc and inner contour corresponding to the smallest amplitude of the arc, to distribute energy as a function of the desired results: homogenous density of the transmitted energy, penetration effect, structural effect, etc. Of course, these contours may be circular, elliptical or of other shapes. By turning the arc sufficiently rapidly, it is possible to make it form a practically continuous bell-shaped or cylindrical sheet. This enables, for a given 14 current, an appreciable gain to be obtained in the arc voltage and, consequently, in the arc power. This voltage increase is closely related to the energy-absorption possibilities of the various gases used, for example dissociable gases such as H2 By forming a continuous sheet in this manner, the - -dissociable gases used are caused to remain inside the volume limited by the sheet, which ensures that practically the entire mass of gas in this volume is dissociated. In other ~- -words, the degree of ionization is considerably increased.
2Q These effects have a favorable incidence on the dimensions of non-transferred arc torches since, for a given power, the anode operates at relatively lower currents and is subjected to lesser solicitations, which avoids damage to or premature destruction of the anode. These plasma torches with non-transferred arcs are used in very diverse fields such as for the deposit of refractory materials, electro-erosion and the cutting of stony materials and non-conductors and, of course, operations on metal pieces.
Naturally, the arrangement for providing a turning 3~ field could be conceived for supply by a polyphase current other than triphase.
,. ... . ,, . , :... ,: :
. ..
.. - ~ - , ... . .
The invention relates to the cutting, eroding, welding and depositing of metallic and non-metallic materials by means of electric arcs.
Some known arc welding devices have a d.c. or an a.c. electromagnet producing a magnetic field to impart a rectilinear oscillating movement to the arc. These known devices were designed to replace the previous mechanical means for rocking the torch to make the arc oscillate along a rectilinear path. In other known arc welding devices the arc is made to turn by submitting it to a turning magnetic field.
According to the invention there is provided a method of cutting, eroding, welding or depositing a metallic or non-metallic material by means of an electric arc that is made to turn by submitting it to a turning magnetic field, comprising controlling the trajectory and the speed of at least one of the ends of the arc.
The invention also proposes a device for carrying out such a method comprising means for producing, in the proximity of the arc, a turning magnetic field acting on the arc to make it turn, and means for controlling the trajectory and the speed of at least one of the ends of the arc.
It can be seen that the invention is distinguished from the aforementioned known methods and devices in that the ~-path and the rotational speed of the arc are controlled. The important advantages that this involves will be mentioned later.
The accompanying drawings show, by way of example, several embodiments of devices according to the invention, illustrating several manners of carrying out the method. In the drawings:
Fig. 1 is an axial cross-section of a magnetic ......
:, z armature, in cross-section along line 1-1 of Fig. 2;
Fig. 2 is a plan view of the armature of Fig. l;
Fig. 3 is an axial cross-section of a first embodi-ment of device, namely a torch surrounded by the armature of Figs. 1 and 2;
Fig. 4 is an overall schematic diagram of the first embodiment of device;
Fig. 5 is an axial cross-section of a second embodi-ment;
lQ Fig. 6 is an axial cross-section of a third embodi-ment; and Fig. 7 is an axial cross-section of a fourth embodi-ment.
The embodiment of Figs. 1 to 3 comprises a plasma torch of the non-transferred arc type having a refractory sleeve 1 in which is disposed an electrode 2 connected to the negative terminal of a supply. Electrode 2 is fixed at a closed end 3 of sleeve 1. At its opposite end, the sleeve 1 has, as is known, a second electrode 4 formed by a metal piece 2Q with an axial bore 5. This second electrode 4 is connected to the positive terminal of the supply to produce an arc 6 between the free end of electrode 2 and an inner conical part 7 of electrode 4.
The electrode 2 has an axial duct 8 through which a gas is fed and the wall of sleeve 1 also has an orifice 9 for the supply of gas. These gases may, according to the case, be chosen to provide cooling, chemical protection or to produce desired arc characteristics (i.e. be ionizable, dissociable).
The gases are discharged as a plasma by bore 5 and act, as is 3Q known, on a workpiece 30 (Fig. 4). All that has just been described is known. The device additionally has an annular - . . .. .
10~50'~'~
magnetic armature 10 having three arms 11, 12, 13 about each of which is disposed a respective winding 14, 15, 16. The arms 11, 12, 13 each terminate with a pole piece 17, 18, 19 disposed in star configuration angularly spaced at 120 to one another, as shown on Fig. 2. The armature 10 with its windings 14, 15, 16 surrounds the sleeve 1, as shown in Fig.
3. The pole pieces (of which only one, 17, is visible on Fig.
3) are disposed adjacent to and facing the region in sleeve 1 where the arc 6 is produced.
The three windings are each fed by one of the phases of a triphase current in a manner to produce a turning magnetic field. When the windings 14, 15, 16 are supplied with triphase current, the turning magnetic field produced by the pole pieces 17, 18, 19 acts on arc 6 and causes it to turn about the axis of the torch.
This rotation of the arc has the advantage of ensuring an absolutely homogeneous distribution of energy, which favorizes cooling of the electrodes 2 and 4 and conse-quently enables a reduction of their dimensions.
Fig. 4 schematically shows the overall device, i.e.
the torch of Fig. 3 with its means for supplying and for con-trolling rotation of the arc. On this figure, the current source supplying arc 6 is designated by 20, and 21 designates the installation for supplying polyphase current (triphase, in the example given) to windings 14, 15, 16. Installation 21 comprises a variable-frequency pilot generator 22, a polyphase current generator 23 piloted by generator 22, and three amplifiers 24, 25, 26 supplying current to the windings 14, 15, 16. Amplifiers 24, 25, 26 are controlled by an amplitude-adjusting unit 27 servo-controlled by a pulse generator 28 itself controlled by pilot generator 22. Unit 29 is a .
o~
frequency control unit and 30 designates the metallic or non-metallic workpiece.
In relation to devices with a direct supply from an industrial (mains) polyphase networ]c, the described device has the great advantage of enabling several frequencies to be set at will.
Fig. 5 shows a torch with a transferred plasma arc.
The torch is of analogous construction to that of Fig. 3, except that negative electrode 31 is solid and piece 32, equivalent to 4 of Fig. 3, no longer forms the positive electrode but acts as means for constricting the arc 33, the workpice 34 being connected to the positive terminal of the supply. The electromagnetic means for rotating the arc are analogous to those of Figs. 1 to 3, but with the following differences: the armature 35 with arms such as 36 and windings such as 37, 38 arranged in star-configuration as in the first embodiment are disposed about the refractory sleeve 39 in such a manner that the pole pieces (of which two, 41, 42, are visible) are adjacent bore 42 of piece 32, in the -~
region between piece 32 and the workpiece 34. With this arrangement, the turning magnetic field produced by the pole -pieces acts on part of arc 33 outside the torch and makes it turn as indicated by arrow 43.
Fig. 6 shows a torch of the so-called "TIG" type operating with a gaseous flux and a refractory electrode. The refractory electrode 44 is disposed axially in a refractory sleeve 45, with a free end of the electrode engaged in an opening 46 at one of the ends of sleeve 45. An arc 48 is produced between the point of electrode 44 and a workpiece 47.
Arrow 49 indicates how the arc 48 turns under the effect of the turning magnetic field produced by three pole pieces of -. - , . : : :.: ~.. - . .. . : .
106~22 which only two, 50, 51, are visible. The electromagnetic means for rotating the arc are identical to those described with reference to Fig. 5.
Fig. 7 shows a fusible-electrode torch operating with gaseous flux. In a refractory sleeve 52 is axially disposed a metal tube 53 connected to the positive terminal of the arc supply. Tube 53 guides an electrode-forming fusible metal wire 54 which is progressively unwound from a spool 55 in operation of the device. Sleeve 52 has a central opening 56 at its end opposite that to which tube 53 is fixed. The means for rotating the arc are the same as those of Figs. 5 and 6, and comprise three pole pieces disposed at 120 (of which two, 57, 58 are shown) and acting on the arc 59 passing between the end 60 of fusible electrode 54 and the workpiece 61 which is connected to the negative terminal of the arc supply. Arrow 62 indicates the rotational movement of arc 59 under the action of the turning field.
In operation, drops 63 of metal from the fusible electrode 60 are deposited on piece 61.
2Q By associating the various described devices with a control installation such as 21 of Fig. 4, it is possible to control the energy density transmitted to the workpiece and, moreover, when a fusible electrode is employed, the transfer to the workpiece can be controlled. The turning magnetic field can be regulated in amplitude and speed of rotation, in a periodic or non-periodic manner, by the supply voltage and frequency, and by the arrangement of the windings. By varying, as a function of time, the supply voltage and fre-quency either separately or simultaneously, it is possible to 3Q obtain arc pulsation effects which are rendered perfectly con-trollable. It is hence possible on an area of the workpiece - 5 - ~-. . : :
. : . , . .: .:: . .
. ~
- .
.,. . , , , : .- : . .: ~: . , ~ : . .
.. . . , , , .. :
delimited by an external contour corresponding to the greatest amplitude of the arc and inner contour corresponding to the smallest amplitude of the arc, to distribute energy as a function of the desired results: homogenous density of the transmitted energy, penetration effect, structural effect, etc. Of course, these contours may be circular, elliptical or of other shapes. By turning the arc sufficiently rapidly, it is possible to make it form a practically continuous bell-shaped or cylindrical sheet. This enables, for a given 14 current, an appreciable gain to be obtained in the arc voltage and, consequently, in the arc power. This voltage increase is closely related to the energy-absorption possibilities of the various gases used, for example dissociable gases such as H2 By forming a continuous sheet in this manner, the - -dissociable gases used are caused to remain inside the volume limited by the sheet, which ensures that practically the entire mass of gas in this volume is dissociated. In other ~- -words, the degree of ionization is considerably increased.
2Q These effects have a favorable incidence on the dimensions of non-transferred arc torches since, for a given power, the anode operates at relatively lower currents and is subjected to lesser solicitations, which avoids damage to or premature destruction of the anode. These plasma torches with non-transferred arcs are used in very diverse fields such as for the deposit of refractory materials, electro-erosion and the cutting of stony materials and non-conductors and, of course, operations on metal pieces.
Naturally, the arrangement for providing a turning 3~ field could be conceived for supply by a polyphase current other than triphase.
,. ... . ,, . , :... ,: :
. ..
.. - ~ - , ... . .
Claims (11)
1. A method of cutting, eroding, welding or depositing a metallic or non-metallic material comprising: causing an electric arc to rotate by submitting said arc to a rotating magnetic field; and controlling the path of at least one end of said arc to thereby vary the speed of rotation of said arc and the distance of the route of said arc to the center of rotation whereby said route may be made to sweep a surface of any predetermined shape.
2. A method according to Claim 1, comprising varying the amplitude and speed of rotation of the turning magnetic field as a function of time by varying, as a function of time, the voltage and frequency of a polyphase current serving to produce the field.
3. A method according to Claim 1, comprising turning the arc to form a practically continuous bell-shaped or cylindrical sheet.
4. A method according to Claim 1, in which the arc is transferred onto a metal workpiece, comprising controlling the trajectory and the speed of the end of the arc on the workpiece.
5. A method according to Claim 1, in which the arc is contained within a torch, and the magnetic field is made to act on the arc through a wall of said torch.
6. A device for cutting, eroding, welding or depositing a metallic or non-metallic material by means of an arc comprising: means for producing, in the proximity of said arc, a rotating magnetic field acting on said arc to cause said arc to rotate; and means for controlling at least one end of said arc in order to vary the speed of rotation of said arc and the distance of the route of said arc to the center of rotation whereby said route may be made to sweep a surface of any predetermined shape.
7. A device according to Claim 6, comprising a plasma torch of the non-transferred arc type including a refractory sleeve enclosing a region where the arc is produced, and a magnetic armature having pole pieces disposed about the sleeve facing said region where the arc is produced to act on the arc through the sleeve.
8. A device according to Claim 6, comprising a torch of the transferred arc type including a refractory sleeve having an opening through which the arc passes from an electrode inside the sleeve to an external workpiece, and a magnetic armature having windings disposed about the sleeve and pole pieces disposed adjacent said opening in the region between said opening and the workpiece to act on part of the arc outside said sleeve of the torch.
9. A device according to Claim 8, in which the torch is a plasma torch.
10. A device according to Claim 8, in which the torch has a refractory electrode.
11. A device according to Claim 8, in which the torch has a fusible electrode.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH91975A CH591306A5 (en) | 1975-01-27 | 1975-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1065022A true CA1065022A (en) | 1979-10-23 |
Family
ID=4198219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA244,830A Expired CA1065022A (en) | 1975-01-27 | 1976-01-27 | Method and device for controlling an electric arc by rotating magnetic field |
Country Status (18)
| Country | Link |
|---|---|
| JP (1) | JPS5199651A (en) |
| AT (1) | AT348310B (en) |
| AU (1) | AU499770B2 (en) |
| BE (1) | BE837654A (en) |
| CA (1) | CA1065022A (en) |
| CH (1) | CH591306A5 (en) |
| DE (1) | DE2602513C2 (en) |
| DK (1) | DK143057C (en) |
| FI (1) | FI753731A (en) |
| FR (1) | FR2298399A1 (en) |
| GB (1) | GB1521622A (en) |
| IN (1) | IN143042B (en) |
| IT (1) | IT1059333B (en) |
| NL (1) | NL7600545A (en) |
| NO (1) | NO760244L (en) |
| PT (1) | PT64742B (en) |
| SE (1) | SE7600761L (en) |
| ZA (1) | ZA76432B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2757309C3 (en) * | 1977-12-22 | 1981-06-11 | Industrie-Werke Karlsruhe Augsburg AG Zweigniederlassung Keller & Knappich Augsburg, 8900 Augsburg | Device for welding metallic workpieces with a magnetically moving arc |
| IT1219974B (en) * | 1981-06-25 | 1990-05-24 | Fischer Ag Georg | REFUSION HARDENING PROCEDURE |
| DE3805732A1 (en) * | 1988-02-24 | 1989-09-07 | Linde Ag | Plasma burner |
| US4965431A (en) * | 1989-08-21 | 1990-10-23 | Blackstone Corporation | Sweep welding method and apparatus therefor |
| WO1991010342A1 (en) * | 1990-01-04 | 1991-07-11 | Nkk Corporation | Moving plasma torch |
| DE19944468B4 (en) * | 1999-09-16 | 2008-01-31 | Linde Ag | Method and apparatus for TIG / WP hybrid welding |
| DE102005033744A1 (en) * | 2005-07-15 | 2007-02-01 | Felix Politt | Hand piece for a wire-welding unit for an arc welding apparatus and a wire-feeding device has electrode with welding wire feed channel and coil with metal core to give alternating electromagnetic field |
| AT505813B1 (en) | 2007-10-10 | 2009-06-15 | Svoboda Eugen | METHOD FOR OPERATING A PLASMA BRAINER AND PLASMA BURNER |
| DE102019130644A1 (en) * | 2019-11-13 | 2021-05-20 | Endress+Hauser Flowtec Ag | Use of an arc welding device comprising a straightening apparatus |
| DE102019130643A1 (en) * | 2019-11-13 | 2021-05-20 | Endress+Hauser Flowtec Ag | Straightening apparatus for aligning an arc of an arc welding device for arc welding with a magnetically moved arc and using the straightening apparatus |
| CN115121912B (en) * | 2022-06-27 | 2023-08-22 | 湘潭大学 | Excitation current calibration method for multipole magnetic control GTAW arc sensor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1792243A (en) * | 1928-01-21 | 1931-02-10 | Smith Corp A O | Apparatus for electric-arc welding |
| DE1230148B (en) * | 1962-11-14 | 1966-12-08 | Atomenergikommissionen | Device for arc welding with an arc moved along a path by means of a magnetic field |
| FR1390475A (en) * | 1964-02-12 | 1965-02-26 | Sciaky Sa | Rotary arc welding machine |
| DE1565002A1 (en) * | 1965-02-12 | 1970-04-16 | Patra Patent Treuhand | Plasma torch for processing lamp parts |
| AT317641B (en) * | 1972-09-07 | 1974-09-10 | Simmering Graz Pauker Ag | Method and device for electric arc welding |
-
1975
- 1975-01-27 CH CH91975A patent/CH591306A5/xx not_active IP Right Cessation
- 1975-12-31 FI FI753731A patent/FI753731A/fi not_active Application Discontinuation
-
1976
- 1976-01-16 BE BE163581A patent/BE837654A/en not_active IP Right Cessation
- 1976-01-16 IN IN95/CAL/76A patent/IN143042B/en unknown
- 1976-01-20 NL NL7600545A patent/NL7600545A/en not_active Application Discontinuation
- 1976-01-21 AU AU10442/76A patent/AU499770B2/en not_active Expired
- 1976-01-22 AT AT41776A patent/AT348310B/en not_active IP Right Cessation
- 1976-01-23 DE DE2602513A patent/DE2602513C2/en not_active Expired
- 1976-01-23 IT IT09324/76A patent/IT1059333B/en active
- 1976-01-26 DK DK29076A patent/DK143057C/en not_active IP Right Cessation
- 1976-01-26 PT PT64742A patent/PT64742B/en unknown
- 1976-01-26 NO NO760244A patent/NO760244L/no unknown
- 1976-01-26 FR FR7601997A patent/FR2298399A1/en active Granted
- 1976-01-26 SE SE7600761A patent/SE7600761L/en unknown
- 1976-01-27 GB GB3158/76A patent/GB1521622A/en not_active Expired
- 1976-01-27 ZA ZA432A patent/ZA76432B/en unknown
- 1976-01-27 CA CA244,830A patent/CA1065022A/en not_active Expired
- 1976-01-27 JP JP51007205A patent/JPS5199651A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FI753731A (en) | 1976-07-28 |
| GB1521622A (en) | 1978-08-16 |
| CH591306A5 (en) | 1977-09-15 |
| NO760244L (en) | 1976-07-28 |
| FR2298399A1 (en) | 1976-08-20 |
| DK143057B (en) | 1981-03-23 |
| PT64742A (en) | 1976-02-01 |
| ATA41776A (en) | 1978-06-15 |
| IN143042B (en) | 1977-09-24 |
| DE2602513A1 (en) | 1976-07-29 |
| DK143057C (en) | 1981-10-26 |
| SE7600761L (en) | 1976-07-28 |
| JPS5199651A (en) | 1976-09-02 |
| PT64742B (en) | 1977-08-12 |
| DK29076A (en) | 1976-07-28 |
| ZA76432B (en) | 1977-01-26 |
| NL7600545A (en) | 1976-07-29 |
| DE2602513C2 (en) | 1982-10-07 |
| FR2298399B1 (en) | 1982-02-19 |
| AU1044276A (en) | 1977-07-28 |
| AU499770B2 (en) | 1979-05-03 |
| IT1059333B (en) | 1982-05-31 |
| BE837654A (en) | 1976-05-14 |
| AT348310B (en) | 1979-02-12 |
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