Method for drilling holes similar to bottles with a geometry defined by a pulsed laser radiation

摘要

Method for drilling holes (9, 18) in a diameter range 20 .mu.m to 500 .mu.m by deradiación laser (19) drawing on the one hand, the beam quality of sources of laser radiation and, on the other hand, lapolarización of radiation (19), the parameters of the laser pulses used and the nature and laminations working pressure used, wherein is established, in accordance with the quality coefficient K rayoy length λ wave, the relationship between beam diameter in the place of location of the focusing element and focal ladistancia thereof, which is between 1 and 6, so that a drilled hole (9, 18) is obtained delongitud L, which is shaped like a bottle and is characterized by a smaller upper diameter dA, ungollete adjacent bottle (4) of length lA with subsequent widening in a transition zone (5) hastaun diameter and the cylindrical portion (6) constituting the volume Main around the bore (9, 18) or seensancha slightly to the lower end of the bore hole of the inlet fluid (7), endonde the ratio of the length of the bore (9, 18) the diameter of the outlet fluid L / dA is of2 to 20 and the ratio of the length of the bore (9, 18) to the length of the bottle neck L / lA is elintervalo 3 to 10, and because the process drilling is subdivided into a first segment, the segment depretaladrado, which on the one hand, must realize and widely the bottle neck hole in his formadeseada and on the other hand, should create favorable conditions for the second tranche of drill premises, and segundosegmento, the segment of drilling conformation wherein they have to create the transition zone and the body of the bottle zonadel according fluidic slogans.