Robert Boschgmbh

Karl Deutsch Pruef- Und Messgeraetebau Gmbh & Co. Kg

Bosch Rexroth Ag

Volker Arndt

Michael Platte

Michael Lach

Heinz-Ullrich Mueller

Juergen Haeufgloeckner

Klaus Offterdinger

Michael Ripper

Norbert Blumentritt

Walter Pasdzior

Wolfgang Stumm

A welding process for the welding of aluminum includes a force sensor measuring a force between two welding electrodes on aluminum elements to be welded and transmitting its measured values to a welding control. Until the elapse of a set welding time, the welding control calculates and stores at least one absolute value and/or at least one increase in the measured force. The welding control compares the measured absolute value and/or the increase in the measured force with a reference value and/or a reference curve and calculates a control deviation from the comparison. After the elapse of the set welding time, the welding control subjects the welding electrodes to a constant current during a welding time extension that follows the set welding time, dependent on a magnitude of the control deviation that is measured at the point in time of the elapse and/or during the set welding time.

Welding process for the Welding of Aluminum

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 relates to an ultrasound sensor system, especially for a welding electrode, comprising a sensor () which, during the detection process, passes ultrasonic waves of a desired oscillation mode into areas to be detected and/or detects ultrasonic waves. At least one material recess () is provided in a sensor support (), and at least one sensor () is arranged in said recess.

Ultrasound sensor system

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.

Ultrasonic sensor system for horizontally polarized transversal waves

A welding system includes a device for evaluating an ultrasonic signal during a welding process. The device has a meassured value evaluation unit that, in normal operation, evaluates at least one measurement signal that is derived from an ultrasonic signal and is located inside a measurement window. A mechanism for establishing the measurement window is provided, which establishes the measurement window according to a measurement signal that is received in a calibration operation.

Device for evaluating signals

The invention relates to a device and method for determining parameters of a welding system. According to the invention, a welding area () is subjected to the action of ultrasonic waves, preferably to the action of shear waves, by using an ultrasound source (). During a first welding process (n), a signal processing () determines a first ultrasonic permeability (Dn) from a received ultrasonic signal (UE). During at least one subsequent welding process (n), a second ultrasonic permeability (Dn) is determined from an ultrasonic signal (UE) that is received during a renewed exposure of the welding area () to ultrasonic waves. A display () and/or a diagnostic function and/or a correction of control quantities of the welding system is/are carried out as a function of the at least two ultrasonic permeabilities (Dn, Dn).

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Erbach, Germany

Volker Arndt