Monitoring a resistance welding process comprises analyzing measurable force signals during a current flow phase so that force fluctuations are acquired with reference to the current flow signal

摘要

Method for monitoring a resistance welding process comprises analyzing measurable force signals during a current flow phase so that force fluctuations are acquired with reference to the current flow signal and the progression of the fluctuations is compared to a theoretical curve. An Independent claim is also included for a device for monitoring a resistance welding process comprising an integrator (3), a differential amplifier (4), a dynamic switch (5), an extreme value former (9/10), a further differential amplifier (11), and a further dynamic switch (12).