Changes

Besides destructive testing for shear force and weld area the non-destructive ultrasound testing of the joint quality is also utilized for welded contact assemblies <xr id="fig:Ultrasonic picture of a weld"/> <!--(Fig. 3.16)-->.

In the preceding sections a multitude of possibilities for the attachment of contact materials to their carriers was described. A correlation of these methods to the switching current of electromechanical devices is illustrated in <xr id="fig:Correlation between Contact Joining Methods and Switching Currents"/> <!--(Tab. 3.2)-->. It shows that for the same switching load multiple attachment methods can be applied. Which method to chose depends on a variety of parameters such as contact material, material combination of contact and carrier, shape of the contact, required number of switching operations and last but not least the required volume of parts to be manufactured.