Verfahren zur Bewertung von Widerstandsschweissverbindungen
Date Issued
1995
Author(s)
Waschkies, E.
Patent No
1992-4225251
Abstract
The description relates to a process for the online assessment of welding processes and in particular resistance welding joints, using an ultrasonic source which is applied to the welding area with shear waves, and an ultrasonic receiver. The process according to the invention comprises the following steps: - the time t<-s at which the melting temperature T<-s of the weld metal is reached, is determined from the output signal of the ultrasonic receiver and a weld nugget starts to form, - from the weakness of the shear waves after reaching the melting temperature, the welding nugget volume V is calculated during the welding process.