Salzgitter Mannesmann Line Pipe Gmbh

Holger Brauer

Jörn Winkels

Michael Kaack

Gerd-Joachim Deppe

Joern Winkels

Christian Kremer

Norbert Schönartz

The invention relates to a method for testing connections of metal workpieces to plastic compounds for cavities by means of ultrasound, wherein the plastic compound is arranged between the workpiece as an intermediate layer or is connected to the workpiece on one side and the cavity is located within the plastic compound, wherein the cavity is connected to the workpiece by means of a remaining plastic layer or plastic skin and wherein the plastic compound is exposed to ultrasonic signals of a certain test frequency and pulse length from the metal side of the workpiece by means of at least one ultrasonic probe, and in particular the ultrasonic signals reflected by flaws in the plastic compound are detected by the same or another ultrasonic probe and converted into electrical signals that can be evaluated and subjected to a threshold observation. The test frequency of the ultrasonic signals is set in a range of 1 to 10 MHz so that the attenuation of the sound is minimal after passing through the plastic skin.

Method for testing connections of metal workpieces to plastic compounds for cavities by means of ultrasound

A two-dimensional light-section method for measuring the profile geometry of cylindrical bodies is disclosed. A fan-shaped laser line forming a light-section line on the surface of the body is imaged with at least one laser, and the laser radiation reflected from the surface of the body is captured by at least one area imaging camera, wherein the laser and the camera are arranged at a triangulation angle in a normal plane aligned with the cylinder axis. The profile geometry is then measured by pivoting the laser out of the normal plane about the cylinder axis. The angle with respect to the normal plane is selected such that the optical axis of the area imaging camera with respect to the surface of the cylinder is located within the glancing angle range of the reflected beams.

Method and apparatus for measurement of the profile geometry of cylindrical bodies

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Gelsenkirchen, Germany

Holger Brauer