Patent ID: 6479790
Filing Date: 2002-11-12
Classification: C21D

Abstract:
A method for controlling three-dimensional alignment of dual laser beams for shock peening an article, the method comprising:defining a spot pattern comprising a plurality of spots on a first surface of the article to be peened; defining a spot pattern comprising a plurality of spots on a second surface of the article to be peened, the first and second surfaces comprising mutually opposite surfaces relative to one another, each one of the respective spots on the second surface being arranged to correspond to a respective spot on the first surface and comprising a plurality of matched pair of spots; generating dual laser beams being respectively aligned to simultaneously impinge on each respective matched pair of spots, wherein the three dimensional alignment of the dual laser beams relative to the article comprises: defining an article alignment vector and an article working plane along which the article alignment vector is situated; defining a laser alignment vector and a laser working plane along which the laser alignment vector is situated; executing relative rotation between the article working plane and the laser working plane to provide parallel alignment between the article alignment vector and the laser alignment vector; and executing relative translation motion between the article and the dual laser beams so that one of the laser beams coincides with the center point of the spot on the first surface and the other of the laser beams coincides with the center point of the spot on the second surface.