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公开(公告)号：US5609779A
公开(公告)日：1997-03-11
申请号：US648472
申请日：1996-05-15
申请人： John M. Crow , James G. Kelley , Todd J. Rockstroh
发明人： John M. Crow , James G. Kelley , Todd J. Rockstroh
CPC分类号： B23K26/0622 , B23K26/384 , B23K26/389 , B23K2201/001
摘要： A method for forming an aperture in a component wall made of metal, the aperture having a diffuser which opens up and outward from a bottom of the diffuser to a first surface of the wall, the method includes the following steps: A) laser machining the wall with a laser which produces a laser beam having a pulse rate and power sufficient to vaporize the metal; B) firing and traversing the laser beam, preferably at an acute angle, across the surface to a predetermined first edge of the diffuser in a single pass starting at a centerline of the diffuser; and C) traversing the laser beam at an increasing rate of speed during the pass so that each beam pulse vaporizes the metal at a laser spot such that successive laser spots substantially overlap each other in decreasing amounts and the pulses nibble out the metal to form a continuous trench below the surface.
摘要翻译： 一种用于在由金属制成的部件壁中形成孔的方法，所述孔具有从扩散器的底部向外开放到壁的第一表面的扩散器，该方法包括以下步骤：A）激光加工 具有产生具有足以使金属蒸发的脉率和功率的激光束的激光器; B）从扩散器的中心线开始并穿过激光束，优选以锐角穿过该表面到达扩散器的预定第一边缘; 并且C）在通过期间以增加的速度穿过激光束，使得每个光束脉冲在激光点处使金属蒸发，使得连续的激光点基本上以减少的量彼此重叠，并且脉冲将金属啃掉以形成 表面连续沟槽。
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公开(公告)号：US06140604A
公开(公告)日：2000-10-31
申请号：US99755
申请日：1998-06-18
申请人： Ralph M. Somers , John M. Crow
发明人： Ralph M. Somers , John M. Crow
CPC分类号： B23K26/032 , B23K26/382
摘要： In a pulse laser drilling process having a machine control for controlling a laser, an apparatus is provided to detect when a hole is drilled through a workpiece. The apparatus detects a laser pulse, where the laser pulse emits a laser light upon drilling impact with the workpiece. A second detection step detects sparks emitted by the workpiece, and a spark signal amplitude representative thereof is produced. The sparks produce visible wavelength light. A filter blocks the laser light and transmits the visible wavelength light. A photosensor associated with the filter senses when the spark signal amplitude diminishes below a predetermined threshold level. An output signal, responsive to the photosensor indicates when a through hole is complete and indicates to the machine control to stop any further laser pulse.
摘要翻译： 在具有用于控制激光器的机器控制的脉冲激光钻孔工艺中，提供了一种用于检测通过工件钻出孔何时的装置。 该装置检测激光脉冲，其中激光脉冲在与工件钻孔冲击时发出激光。 第二检测步骤检测由工件发出的火花，产生代表火花信号的振幅。 火花产生可见波长的光。 A滤光器阻挡激光并透射可见光波长。 与滤光器相关联的光传感器感测火花信号幅度何时降低到预定阈值水平以下。 响应于光电传感器的输出信号指示通孔何时完成，并指示机器控制以停止任何进一步的激光脉冲。
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公开(公告)号：US5747769A
公开(公告)日：1998-05-05
申请号：US555653
申请日：1995-11-13
CPC分类号： B23K26/384 , B23K26/362 , B23K26/364 , B23K26/389
摘要： A method for forming a slot in a metal component having first and second opposite surfaces utilizes a first laser beam having a pulse rate and power to vaporize the metal. The laser beam is traversed across the first surface at a feed rate so that each beam pulse vaporizes the component metal at a spot. The laser beam pulse rate and feed rate are effective so that successive spots do not substantially overlap each other. The laser beam is traversed in repeated steps in a series of passes so that the spots collectively form a continuous slot to a depth below the first surface. In a subsequent step, a second laser beam is positioned in the slot to drill a hole through a base of the slot, with the second laser beam being repositioned to drill a plurality of the through holes spaced apart from each other along the length of the slot.
摘要翻译： 在具有第一和第二相对表面的金属部件中形成槽的方法利用具有脉冲率和功率的第一激光束来蒸发金属。 激光束以进给速率穿过第一表面，使得每个光束脉冲在一点上汽化组分金属。 激光束脉冲速率和进给速率是有效的，使得连续的点基本上彼此不重叠。 激光束在一系列通过中以重复的步骤穿过，使得斑点在第一表面下方一起形成连续的槽。 在随后的步骤中，第二激光束定位在槽中，以穿过槽的底部钻一个孔，其中第二激光束被重新定位以钻出多个彼此间隔开的通孔， 槽
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