ARC WELDING PATH DETECTING METHOD AND ARC WELDING PATH SENSOR

摘要

Provided are an arc welding path detecting method, which facilitates pretreatment required for detection of an arc welding path to lighten load on a welder, and an arc welding path sensor. A delustering agent for promoting irregular reflection of light is sprayed or applied to the circumference of an arc welding path (6) to cause an applied light (3) from a sensor (2) to perform a sure irregular reflection off the surface of a work (4) thus projecting the reflected light (5) into a light receiving portion of the sensor (2). It becomes unnecessary to roughen the surface of the work (4) by manually scratching the same, so that load on a welder is lightened. Further, a spray nozzle (9) is mounted integrally on the sensor (2) to spray the delustering agent in synchronism with an on/off command for arc welding, whereby a process including the pretreatment required for detection of an arc welding path and a main operation for detection of an arc welding path is completely automatized.