Robert Boschgmbh

Bosch Rexroth Ag

Karl Deutsch Pruef- Und Messgeraetebau Gmbh & Co. Kg

Heinz-Ullrich Mueller

Volker Arndt

Michael Platte

Michael Lach

Reinhard Scholz

Beno Klopcic

Drago Dolinar

Gorazd Stumberger

Eckart Goetz

A method for operating a single-phase, mid-frequency welding transformer formed with a transformer core having a primary coil and a secondary coil connected into a secondary circuit has several steps. The several steps include regulating a magnetic flux density (B) in the transformer core between an upper flux density threshold value (Bm) and a lower flux density threshold value (&#x2212;Bm), by applying, in alteration, a first voltage (U) and a second voltage (&#x2212;U) to the primary coil of the transformer, and regulating a load current (i) in the secondary circuit between an upper load current threshold value (i) and a lower load current threshold value (i), by applying, in alternation, a third voltage (0V)to the primary coil of the transformer.

Method and device for operating a transformer

A connecting element for connecting and/or fixing an electrode with an electrode arm of a welding apparatus has a base body; and a sensor selected from the group consisting of a sensor for introducing ultrasound waves into an electrode, a sensor for receiving ultrasound waves and both.

Electrode holder with integrated ultrasound sensor

The invention originates in the field of resistance welding technology, among other means by means of welding robots, for use in roll seam welding, projection welding or spot welding, and has to do with accommodating components for operation inside the housingof the welding tongs. Taking the demands in terms of weight into account, the object of the invention is to achieve the most effective possible utilization of space for the housingof the welding tongs carried by the welding robot. The housingof the welding tongs is given a modulefor this purpose. This moduleincludes modular components that are relevant to performing the welding process that is monitored by the welding controller.

Module for resistance welding tongs

A sensor carrier is provided that has at least one oscillating element () that introduces ultrasonic waves into an area to be examined and/or receives ultrasonic waves coming from the area to be examined, whereby the oscillating element () is located in an oscillator carrier (), and the oscillator carrier () has connecting means () for connection with the electrode ().

Ultrasonic sensor for controlling the process during resistance spot welding

The invention relates to an ultrasonic sensor system, especially for controlling a resistance welding process. Said system comprises at least one receiver which is used to detect the ultrasonic signals from the area to be examined. At least two piezoelectric sensors () are used as a receiver and are arranged in such a way that their polarization direction vectors indicate various directions, said vectors being projected in a plane perpendicular in relation to the propagation direction of an ultrasonic wave to be detected.

Growing community of inventors

Michelstadt, Germany

Heinz-Ullrich Mueller