Method for non-destructive thermographic testing of resistance point welding connections and cracks of components, involves detecting radiated temperature profile of heating zone by camera through recess, and subsequently evaluating profile

摘要

The method involves introducing a heat pulse in an excitation surface (12) of a component (1) by induction coils (3) of a ferromagnetic coil core of an alternating current (AC) inductor (2), where the coils are electrically connected with each other and wound in a same direction. A transversal heat flow is produced in a test zone (5) of the component by the pulse, and homogenously heated. A radiated temperature profile of the zone is hindrance-freely detected by a thermography camera (7) through a recess of the inductor, and subsequently evaluated by a computer (8) coupled with the camera. An independent claim is also included for an arrangement for non-destructive testing of joint connections and material defects in components.