Online quality testing method for use during friction stir welding comprises feeding a friction tool under rotation and pressure into the material of the workpieces being welded and guiding along a joining site of the workpieces

摘要

Method for online quality testing during friction stir welding comprises feeding a friction tool under rotation and pressure into the material of the workpieces being welded and guiding along a joining site of the workpieces The pressure impingement and/or oscillations arising during welding are measured and converted in frequency/amplitude spectra using Fourier transformation. The frequency/amplitude spectra are compared with reference values.