A METHOD FOR DETERMINING A LEVEL OF WEAR OF WELDING ELECTRODE CAPS FOR RESISTANCE SPOT WELDING AND A DEVICE FOR PERFORMING THIS METHOD

摘要

The invention concerns a method for determining a wear level of caps (4) of welding electrodes in resistance spot welding, where the thermal emission intensity from a surface of welding electrode replaceable caps (4) is measured by direct or indirect measurements and on the basis of the increased emissivity on the surface of welding caps (4) a level of their wear is determined, whereas the thermal emission intensity measurement is carried out immediately after a weld has been made. The above mentioned methods are carried out using a device comprising thermal camera (5) for scanning the thermal emission from a surface of welding electrode replaceable cap (4) connected to a computational device, or, possibly, an infrared reflector (7) is added.