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    Laser shock peening with tailored multiple laser beams
    1.
    发明授权
    Laser shock peening with tailored multiple laser beams 失效
    激光冲击硬化与定制的多个激光束

    公开(公告)号：US5911891A

    公开(公告)日：1999-06-15

    申请号：US927716

    申请日：1997-09-11

    申请人： Jeff L. Dulaney ,  Allan H. Clauer ,  David W. Sokol

    发明人： Jeff L. Dulaney ,  Allan H. Clauer ,  David W. Sokol

    IPC分类号： B23K26/00 ,  B23K26/06 ,  C21D10/00

    CPC分类号： B23K26/0069 ,  B23K26/06 ,  C21D10/005

    摘要： Method of changing the residual compressive stresses of an area of a workpiece by tailoring multiple laser beams applied to the workpiece. In one embodiment, a relatively long duration laser pulse is applied to the workpiece followed by a relatively short duration laser pulse. Other tailoring embodiments used to increase the total residual compressive stress of workpieces include blending two laser pulses, or splicing them utilizing a first short sliced-type beam combined with a relatively long duration, high powered gaussian laser beam pulse. A third embodiment utilizes two or more laser beams or pulses of different wavelengths.

    摘要翻译： 通过调整施加到工件上的多个激光束来改变工件区域的残余压应力的方法。 在一个实施例中，将相对长的持续时间的激光脉冲施加到工件，随后是相对短的持续时间的激光脉冲。 用于增加工件的总剩余压缩应力的其他剪裁实施例包括混合两个激光脉冲，或者使用与较长持续时间的高功率高斯激光束脉冲结合的第一短切片型光束来对它们进行拼接。 第三实施例使用两个或更多个不同波长的激光束或脉冲。

    Method for monitoring and controlling laser shock peening using temporal light spectrum analysis
    4.
    发明授权
    Method for monitoring and controlling laser shock peening using temporal light spectrum analysis 失效
    使用时间光谱分析监测和控制激光冲击硬化的方法

    公开(公告)号：US6075593A

    公开(公告)日：2000-06-13

    申请号：US365887

    申请日：1999-08-03

    申请人： Richard L. Trantow ,  Ui W. Suh

    发明人： Richard L. Trantow ,  Ui W. Suh

    IPC分类号： G01N21/63 ,  B23K26/00 ,  C21D10/00 ,  F02C7/00 ,  G01J5/60 ,  G01N21/71 ,  G01N21/88

    CPC分类号： C21D10/005 ,  B23K26/0069 ,  G01N21/718

    摘要： A method for quality assurance of a laser shock peening process of workpieces includes measuring and recording or temporal light intensity data over a short period during the duration of a plasma associated with the vaporized material from laser shots fired during a production laser shock peening process. The recorded temporal data is then analyzed to obtain an instantaneous optical spectrum of the plasma and then used to provide statistical control of the production laser shock peening process. One correlation function of the present invention is based on a time integrated spectral peak intensity wavelength curve for each of the laser firings and for which a peak intensity wavelength is determined for a plurality of times during each plasma of a plurality or all of the firings. Production results from the analysis of the instantaneous optical spectrum is used to determine whether the production laser shock peening process is acceptable. One embodiment of the method compares the production results from the analysis of the instantaneous optical spectrum to a correlation of test results from the analysis of instantaneous optical spectrum and high cycle fatigue failure based on high cycle fatigue tests of test workpieces that are the same or related to the production workpieces and that were laser shock peened in the same or similar laser shock peening apparatus.

    摘要翻译： 用于工件的激光冲击硬化处理的质量保证的方法包括在与在生产激光冲击喷丸处理过程中激发的激光照射的蒸发材料相关联的等离子体的持续时间内在短时间内测量和记录或记录光时间。 然后分析记录的时间数据以获得等离子体的瞬时光谱，然后用于提供生产激光冲击喷丸处理的统计控制。 本发明的一个相关函数是基于每个激光发射的时间积分光谱峰值强度波长曲线，并且在多个或所有发光的每个等离子体期间多次确定峰值强度波长。 使用瞬时光谱分析的生产结果来确定生产激光冲击硬化过程是否可以接受。 该方法的一个实施例将来自瞬时光谱的分析的生产结果与基于相同或相关的测试工件的高周期疲劳试验的瞬时光谱分析和高循环疲劳失效的测试结果的相关性进行比较 对相同或类似的激光冲击喷丸装置进行激光冲击喷丸处理的生产工件。

    Holographic interferometry for monitoring and controlling laser shock peening
    7.
    发明授权
    Holographic interferometry for monitoring and controlling laser shock peening 有权
    全息干涉测量用于监控和控制激光冲击硬化

    公开(公告)号：US6094260A

    公开(公告)日：2000-07-25

    申请号：US133100

    申请日：1998-08-12

    申请人： Todd J. Rockstroh ,  Wilbur D. Scheidt

    发明人： Todd J. Rockstroh ,  Wilbur D. Scheidt

    IPC分类号： B23K26/03 ,  G01B9/021 ,  G01B9/02

    CPC分类号： B23K26/032 ,  B23K26/0069 ,  G01B9/021 ,  Y10S148/90 ,  Y10S148/903

    摘要： A method for quality assurance of a laser shock peening process uses interferometry to form a fringe image from first and second interferograms of unstressed and stressed laser shock peened patches respectively of a workpiece. The fringe image may then be compared to a predetermined correlation of fringe images for indicating quality assurance. Stressing the laser shock peened patch may include loading the production and test workpieces during the production of the first and second images by interferometry while the production and test workpieces are fixtured. The loading may be done by heating, twisting, or bending of at least a portion of the production and test workpieces. The comparing of the production images of fringes may include comparing fringe characteristics of the laser shock peened patches on the production workpieces laser against fringe characteristics of the predetermined correlation.

    摘要翻译： 用于激光冲击硬化处理的质量保证的方法使用干涉测量从工件的不受应力和应力激光冲击喷丸的第一和第二干涉图形成条纹图像。 然后将条纹图像与用于指示质量保证的条纹图像的预定相关性进行比较。 强调激光冲击硬化贴片可以包括在生产和测试工件时通过干涉测量在制造第一和第二图像期间加载生产和测试工件。 加载可以通过对生产和测试工件的至少一部分进行加热，扭曲或弯曲来完成。 条纹的生产图像的比较可以包括比较生产工件激光器上的激光冲击喷丸的条纹特性与预定相关性的条纹特性。

    Method and apparatus for shaping a laser pulse
    8.
    发明授权
    Method and apparatus for shaping a laser pulse 失效
    用于整形激光脉冲的方法和装置

    公开(公告)号：US5987042A

    公开(公告)日：1999-11-16

    申请号：US961584

    申请日：1997-10-31

    申请人： Phillip Randall Staver ,  Josef Robert Unternahrer

    发明人： Phillip Randall Staver ,  Josef Robert Unternahrer

    IPC分类号： H01S3/10 ,  B23K26/06 ,  H01S3/00 ,  H01S3/136 ,  H01S3/11

    CPC分类号： H01S3/0057 ,  B23K26/0069 ,  B23K26/0622

    摘要： The invention relates to a method and apparatus for shaping a laser pulse. The method comprises the steps of generating a laser pulse with a laser, opening an optical switch to allow the laser pulse to pass through the optical switch, determining a first reference time point with respect to the laser pulse, determining a second reference time point with respect to the opening of the optical switch, and adjusting an opening time of the optical switch based on the first and second reference time points to shape the laser pulse. The method may be carried out with an apparatus which comprises a laser which generates the laser pulse, a first optical detector which detects the laser pulse and generates a first signal representing the laser pulse, an optical switch through which the laser pulse passes, a second optical detector which detects the laser pulse after the laser pulse has passed through the optical switch, and which generates a second signal representing the laser pulse, a computer which receives the first and second signals and which calculates a delay period based on the first and second signals, and a pulse generator which receives the delay period from the computer and which generates a pulse delayed by the delay period to open the optical switch.

    摘要翻译： 本发明涉及一种用于整形激光脉冲的方法和装置。 该方法包括以下步骤：用激光产生激光脉冲，打开光学开关以允许激光脉冲通过光学开关，确定相对于激光脉冲的第一参考时间点，确定第二参考时间点与 相对于光开关的打开，以及基于第一和第二参考时间点调整光开关的打开时间，以形成激光脉冲。 该方法可以由包括产生激光脉冲的激光器的装置，检测激光脉冲并产生表示激光脉冲的第一信号的第一光学检测器，激光脉冲通过的光开关，第二 光检测器，其在激光脉冲通过光开关之后检测激光脉冲，并且产生表示激光脉冲的第二信号;计算机，其接收第一和第二信号，并且基于第一和第二信号计算延迟周期 信号和脉冲发生器，其从计算机接收延迟周期，并产生延迟延迟周期的脉冲以打开光开关。

    Object recycling by laser of coating material
    9.
    发明授权
    Object recycling by laser of coating material 失效
    通过激光对象回收涂料

    公开(公告)号：US5614339A

    公开(公告)日：1997-03-25

    申请号：US512825

    申请日：1995-08-09

    申请人： Nikolai Tankovich

    发明人： Nikolai Tankovich

    IPC分类号： B08B7/00 ,  B23K26/00 ,  B41M5/24 ,  B41M7/00 ,  D21B1/32 ,  B05D3/06 ,  G21H5/00

    CPC分类号： D21B1/325 ,  B08B7/0042 ,  B23K26/0063 ,  B23K26/0069 ,  B41M7/0009 ,  B41M5/24 ,  Y02W30/646 ,  Y10S430/146

    摘要： Coated objects are recycled by irradiation with a laser beam. The invention is applied to objects (such as documents) that include an entry surface, a surface coated with a coating (such as text or graphics printed with copier or printer toner), and a body interposed between the surface. A laser beam is directed toward a target region of the coated surface, traveling first through the object's entry surface and body, which are translucent or transparent to the wavelength of light contained in the laser beam. The laser beam generates a plasma shock wave at the target region of the coated surface, thereby discharging particles of the coating located near the target region. The discharged printed matter is discharged away from the object, thereby avoiding undesired impregnation of the coating into the object. Discharged coating may be recycled by collection and subsequent reuse.

    摘要翻译： 涂层物体通过用激光束照射被再循环。 本发明应用于包括入口表面的物体（例如文件），涂覆有涂层的表面（例如用复印机或打印机调色剂印刷的文本或图形）以及插入在表面之间的物体。 激光束被引向涂覆表面的目标区域，首先穿过物体的入射表面和主体，其对于包含在激光束中的光的波长是半透明或透明的。 激光束在涂覆表面的目标区域产生等离子体冲击波，从而排出位于目标区域附近的涂层的颗粒。 排出的印刷物从物体排出，从而避免涂料不期望地浸渍到物体中。 排放的涂层可以通过收集和随后的再利用来再循环。