Fronius International Gmbh

Gernot Trauner

Josef Artelsmair

Walter Stieglbauer

Günter Achleitner

Andreas Pamer

Guenter Achleitner

Uwe Kroiss

Joerg Kazmaier

Stefan Ehrenbrandner

Michael Richtsfeld

Bank Sardy

Marco Haselsteiner

Andreas Schauer

Jörg Kazmaier

A method for actuating an AC/DC voltage converter is specified, which has a DC voltage output between which at least one series circuit of at least two capacitors and at least one series circuit of n switching elements-is arranged, where n&#x2267;4. A connecting point of the switching elements is connected to a connection of an AC voltage input between n/2 switching elements. Two diodes are connected in an antiparallel arrangement to the two switching elements lying closest to the connecting point. In addition, a connecting point of the capacitors is connected to a connecting point of the diodes. An output voltage at the DC voltage output and a potential of the connecting point of the capacitors or diodes are provided as controlled variables, an input current at the AC voltage input is provided as a manipulated variable and the switching elements are provided as an actuating element of a control loop. In addition, a controller for implementing the method and an AC/DC voltage converter containing such a controller are specified.

AC/DC voltage transformer and method of operation therefor

A method for controlling a welder including a fusible electrode stores the values of the welding parameters required for a welding process in a storage device and saves the values as so-called characteristic curves through at least one support point per characteristic curve. A working point is set by a value for the heat input into a workpiece and a value for the wire feed speed. Upon adjustment of any of the values to a welding application the other value is kept constant by a calculation method designed such that a plurality of characteristic curves that are compatible with one another are combined to form a characteristic curve field per welding process and the welding parameters of all support points of the characteristic curves of the characteristic curve field are saved according to defined values of specific welding parameters.

Method for controlling a welder

A collision protection device for connecting a welding torch connected to a hose pack to a robot arm of a welding robot, comprising two coupling elements that is adapted to be detachably connected to each other by means of magnets, wherein one coupling element is designed to be connected to the welding torch or to a torch coupling that is adapted to be connected to the welding torch, and the other coupling element is designed to be connected to the robot arm, and the coupling elements have openings. The openings in the coupling elements are designed for feeding the hose pack through, and the coupling element that is adapted to be connected to the welding torch or to the torch coupling, or the torch coupling comprises elements to be connected to the hose pack.

Collision protection device

The invention relates to a welding method for implementing and monitoring a welding process, whereby a power source () and a feeding device () for the welding rod () are controlled by means of a control device (), and whereby at least one control variable is measured or calculated from characteristic variables of the arc during the welding process. After setting a first and a second time interval () with different durations and a scanning rate for determining the values of the characteristic variable (), the values of the characteristic variable () are stored with every scan, after which, at an instant (), a first mean value () and a second mean value () are calculated from the stored values of the characteristic variable which lie in time intervals earlier in time than the instant () by the control device as the control variable, after which an upper and a lower threshold value () is calculated starting from the first mean value () of the first time interval (), and the control variable is then compared with the upper and with the lower threshold value ().

Welding method for carrying out a welding process

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Buchkirchen, Austria

Gernot Trauner