Process and apparatus for producing an electric arc current and apparatus for stud welding
A method for producing an electric arc current (I s) for short period arc welding of bolts to a workpiece involves: (a) feeding a supply DC potential to an AC converter (30) with four controllable switching elements (S1)-(S4) arranged in an H-bridging circuit with two parallel longitudinal branches...
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Format | Patent |
Language | English French German |
Published |
23.05.2007
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Abstract | A method for producing an electric arc current (I s) for short period arc welding of bolts to a workpiece involves: (a) feeding a supply DC potential to an AC converter (30) with four controllable switching elements (S1)-(S4) arranged in an H-bridging circuit with two parallel longitudinal branches and a transverse branch (43) (in which the arc zone (32) is located); and (b) controlling diagonally located switching elements (S1, S4) and (S2, S3), so that in a first or second type of operation, a positive or negative arc current respectively flows through the transverse branch. Independent claims are included for: (1) a variant of the method, involving: (a') producing a supply AC potential at the secondary side (provided with a central tap point) of a transformer (TWT1); (b') DC-converting the supply AC potential to give a supply DC potential; (c') feeding the supply DC potential to an AC converter with two controllable switching elements(connected in series in a longitudinal branch connected to the DC supply potential), such that an arc zone is located in a branch connected between a recorder between the two switching elements and the central tap point of the secondary side of the transformer; and (d') controlling the two switching elements so that in a first or second type of operation a positive or negative arc current respectively flows; (2) a partial circuit for a machine for short period arc welding, where the partial circuit is for carrying out a process as above; and (3) a short period arc welding plant with a welding head and a control unit, where the control unit includes a partial circuit as above. |
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AbstractList | A method for producing an electric arc current (I s) for short period arc welding of bolts to a workpiece involves: (a) feeding a supply DC potential to an AC converter (30) with four controllable switching elements (S1)-(S4) arranged in an H-bridging circuit with two parallel longitudinal branches and a transverse branch (43) (in which the arc zone (32) is located); and (b) controlling diagonally located switching elements (S1, S4) and (S2, S3), so that in a first or second type of operation, a positive or negative arc current respectively flows through the transverse branch. Independent claims are included for: (1) a variant of the method, involving: (a') producing a supply AC potential at the secondary side (provided with a central tap point) of a transformer (TWT1); (b') DC-converting the supply AC potential to give a supply DC potential; (c') feeding the supply DC potential to an AC converter with two controllable switching elements(connected in series in a longitudinal branch connected to the DC supply potential), such that an arc zone is located in a branch connected between a recorder between the two switching elements and the central tap point of the secondary side of the transformer; and (d') controlling the two switching elements so that in a first or second type of operation a positive or negative arc current respectively flows; (2) a partial circuit for a machine for short period arc welding, where the partial circuit is for carrying out a process as above; and (3) a short period arc welding plant with a welding head and a control unit, where the control unit includes a partial circuit as above. |
Author | SCHMIDT, WOLFGANG SCHMITT, KLAUS GISBERT SCHEFFLER, HEIKO GERHARD |
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DocumentTitleAlternate | Verfahren und Netzteil zum Erzeugen eines elektrischen Lichtbogenstromes sowie Anlage zum Kurzzeit-Lichtbogenbolzenschweissen Méthode et appareil pour la production d'un courant d'arc électrique ainsi que dispositif de soudage de goujons. |
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Snippet | A method for producing an electric arc current (I s) for short period arc welding of bolts to a workpiece involves: (a) feeding a supply DC potential to an AC... |
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SubjectTerms | CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS SOLDERING OR UNSOLDERING TRANSPORTING WELDING WORKING BY LASER BEAM |
Title | Process and apparatus for producing an electric arc current and apparatus for stud welding |
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