3D LASER MARKING METHOD APPLIED TO MARKED OBJECT HAVING DEEP-HOLE STRUCTURE AND BOUNDARY OF MARKED OBJECT

摘要

Disclosed is a 3D laser marking method applied to a marked object (4) having a deep-hole structure and the boundary of the marked object (4). A laser (1), a focusing lens group (2), a galvanometer (3) and a control system are involved in the method. The control system controls the position of a laser focal point in a Z-axis direction of the marked object (4) by controlling the focusing lens group (2). The 3D laser marking method comprises the following steps: importing a 3D model of a marked object (4) (S1); with regard to the marked object (4) having a deep-hole structure, establishing a first virtual marking plane (7), covering a deep-hole position, on a deep-hole portion of the marked object, and the first virtual marking plane extending outwards from the boundary of the marked object (4) so as to form a second virtual marking plane (8) (S2); importing a marking pattern (S3); attaching the pattern (S4); placing the marked object (4) (S5); reading a positional relationship between the pattern and the 3D model (S6); and marking the marked object (4), wherein a pattern at the deep-hole position is directly marked on the first virtual marking plane (7), and a pattern at the boundary of the marked object (4) is directly marked on the second virtual marking plane (8) (S7). The instantaneous large-distance jumping of a Z-axis cursor is effectively avoided, thereby reducing the damage to an adjustment driver (5) and prolonging the service life thereof.