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1.发明授权Laser apparatus including crystal protection circuitry and method of operation thereof 失效激光设备包括晶体保护电路及其操作方法
公开(公告)号：US5177756A
公开(公告)日：1993-01-05
申请号：US733521
申请日：1991-07-22
IPC分类号： H01S3/131
CPC分类号： H01S3/1312
摘要： A laser apparatus is disclosed which is capable of protecting the laser slab or rod crystal within the laser from damage due to overheating when the laser malfunctions in a manner such that laser output ceases while optical pumping of the laser crystal continues. The laser apparatus includes a laser crystal situated within a laser cavity. The apparatus also includes an excitation lamp for pumping the crystal to generate a laser beam to project along a desired main path. A first sensor senses the cessation of the projection of the laser beam along the desired main path and a second sensor senses the continuing excitation of the excitation lamp. The apparatus further includes a extinguishing circuit for extinguishing the excitation lamp a predetermined amount of time after the cessation of the laser beam such that damage to the laser apparatus due to overheating is avoided.
摘要翻译： 公开了一种激光装置，其能够保护激光器内的激光板或棒状晶体免于由于过热而造成的损坏，因为当激光晶体的光泵浦持续时激光输出停止，激光器的功能失效。 激光装置包括位于激光腔内的激光晶体。 该装置还包括用于泵送晶体以产生沿所需主路径突出的激光束的激发灯。 第一传感器感测激光束沿所需主路径的投射的停止，第二传感器感测激发灯的持续激发。 该装置还包括一个熄灭电路，用于在激光束停止之后将激励灯熄灭预定量的时间，从而避免了由于过热而对激光装置造成的损坏。
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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：US5932120A
公开(公告)日：1999-08-03
申请号：US993194
申请日：1997-12-18
CPC分类号： F01D5/286 , C21D10/005 , Y02T50/673
摘要： A method of laser shock peening a gas turbine engine object continuously firing a stationary laser beam, which repeatably pulses between relatively constant periods, on a portion of the object with a low power laser beam, on the order of 3-10 joules, to vaporize material on the surface of a portion of a part made of a strong hard metal, such as a titanium alloy. Laser pulses around small laser beam spots, on the order of 1 mm in diameter, are used to vaporize material on the surface of the portion of the object with the pulses around laser beam spots formed by the laser beam on the surface and form a region having deep compressive residual stresses extending into the object from the laser shock peened surface. Flowing a curtain of water over the surface upon which the laser beam is firing while preferably moving the object until the laser shock peened surface is completely covered by laser beam spots at least once. The surface may be coated with an ablative coating such as a paint which is suitable to produce the plasma or the surface may be unpainted and the metal of the object is used to produce the plasma.
摘要翻译： 一种对燃气涡轮发动机物体进行激光冲击喷丸处理的方法，其连续地将具有3-10焦耳量级的物体的一部分物体在相对恒定的周期之间重复地脉冲的固定激光束激发，以蒸发 在由诸如钛合金的强硬金属制成的部分的一部分的表面上的材料。 使用大约1mm直径的小激光束点处的激光脉冲，用激光束在表面上形成的激光束点周围的脉冲来蒸发物体部分表面上的材料，并形成区域 具有从激光冲击硬化表面延伸到物体中的深的压缩残余应力。 在激光束发射的表面上流动水幕，同时优选地移动物体，直到激光冲击喷丸表面被激光束斑点完全覆盖一次。 表面可以涂覆有烧蚀涂层，例如适合于产生等离子体的涂料，或者表面可以是未涂漆的，并且物体的金属用于产生等离子体。
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公开(公告)号：US07281546B2
公开(公告)日：2007-10-16
申请号：US10664083
申请日：2003-09-17
IPC分类号： B65D59/06
CPC分类号： F16L57/005 , Y10T137/2501
摘要： A method and system are shown for protecting the threaded ends of tubular goods such as oil field tubulars from physical damage and corrosion due to environmental factors. A thread protector is formed of a polymeric body having cylindrical wall portions which engage the threaded ends of the tubular goods. Instead of relying upon a separate thread compound or corrosion inhibitor applied to the exposed threads, the polymeric body has incorporated therein a corrosion inhibiting compound, which is blended within the polymeric body as a part of the manufacturing process used to mold the polymeric body. The thread protector of the present disclosure includes a weather barrier to minimize exposure of the threaded ends of the tubular goods to moisture and other contaminants. The weather barrier includes a weather barrier ring and an air vent.
摘要翻译： 示出了一种方法和系统，用于保护诸如油田管的管状物品的螺纹端部免受因环境因素的物理损伤和腐蚀。 螺纹保护器由具有与管状物品的螺纹端接合的圆柱形壁部分的聚合物主体形成。 聚合物主体不是依赖于施加到暴露的丝线上的单独的丝线化合物或腐蚀抑制剂，而是在其中掺入腐蚀抑制化合物，其作为用于模制聚合物体的制造方法的一部分在聚合物体内共混。 本公开的螺纹保护器包括防护罩以最小化管状物品的螺纹端部暴露于湿气和其它污染物。 天气屏障包括防风雨环和通风口。
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公开(公告)号：US5223692A
公开(公告)日：1993-06-29
申请号：US764256
申请日：1991-09-23
申请人： Todd B. Lozier , James G. Kelley
发明人： Todd B. Lozier , James G. Kelley
CPC分类号： B23K26/04 , B23K26/0732 , B23K26/384 , B23K26/388 , B23K26/389 , B23K2201/001 , B23P2700/06
摘要： An improved method and apparatus for laser trepanning a passage through a workpiece, gas turbine engine component or the like includes the method steps of: providing a linearly polarized beam of laser energy; focusing the laser beam on a selected location on the component; moving one of the laser beam or the workpiece relative to one another along a first selected trepanning path and along a second selected trepanning path, which is substantially opposite in direction to the first selected path, to compensate for the linear polarization of the laser beam and to reduce the processing time. The steps of moving one of the laser beam or the workpiece along the first and second trepanning paths are repeated until a passage is cut to a desired depth into the surface of the component or the passage is cut entirely through the component. An apparatus for accomplishing the method of the present invention includes a laser system for generating a linearly polarized beam of laser energy and a manipulator arrangement for moving one of the laser system or the component relative to one another. The apparatus further includes a computer controller which is programmed to move either the laser system or the component along the first and second selected trepanning paths.
摘要翻译： 用于激光扫描通过工件，燃气涡轮发动机部件或类似物的通道的改进的方法和装置包括以下方法步骤：提供激光能量的线偏振光束; 将激光束聚焦在组件上的选定位置; 沿着第一选择的trepanning路径并且沿着与第一选定路径的方向基本相反的第二选择的trepanning路径移动激光束或工件之一，以补偿激光束的线性偏振，并且 以减少处理时间。 重复沿着第一和第二切割路径移动激光束或工件之一的步骤，直到将通道切割成部件表面的期望深度或者通过整个切割部件的截面。 用于实现本发明的方法的装置包括用于产生激光能量的线偏振光束的激光系统和用于相对于彼此移动激光系统或部件之一的操纵器装置。 该装置还包括计算机控制器，其被编程为沿着第一和第二选择的扫描路径移动激光系统或部件。
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