Patent ID: 9052273
Filing Date: 2015-06-09
Classification: B23K,G01N

Abstract:
1. A method for inspecting a butt weld of two transverse ends of first and second metal strips, the method comprising the following steps: bringing together and holding the transverse ends between a first jaw and a second jaw each disposed along a respective one of the transverse ends, leaving at least one space between the first jaw and the second jaw and forming an interstice configured to permit passage of a first transmission channel of incident waves able to generate ultrasound waves on one surface of the first strip and to enable passage of a second transmission channel of waves emerging from a surface of the second strip; generating the incident waves of the first channel using laser pulses in an operating state at least configured to implement a third channel of ultrasound waves generated on the surface of the first strip, passing through the weld, and emerging in the second channel; and extracting weld inspection characteristics for identification in a step of analyzing the operating state related to the pulses and at least one measurement of a signature of a vibration state of the surface of the second strip upon emergence of the ultrasound waves in the second channel, enabling an inspection of external and internal defects related to a strip-weld-strip structure.