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    LASER SHOCK PEENING METHOD USING LOW ENERGY LASER BEAM
    2.
    发明专利
    LASER SHOCK PEENING METHOD USING LOW ENERGY LASER BEAM 失效

    公开(公告)号：JPH11254156A

    公开(公告)日：1999-09-21

    申请号：JP34628398

    申请日：1998-12-07

    Applicant: GEN ELECTRIC

    Inventor： MANNAVA SEETHARAMAIAH ,  ROCKSTROH TODD JAY ,  KELLEY JAMES G

    IPC: B23K26/00 ,  B23K26/14 ,  C21D7/06 ,  C21D10/00 ,  C23F4/02 ,  F01D5/28

    Abstract: PROBLEM TO BE SOLVED: To provide a laser shock peening method of a hard metallic parts such as a titanium alloy parts of a gas turbine engine. SOLUTION: The stationary laser beam of low output of about 3-10 Joule to be repeatedly pulsed for a relatively constant period is continuously emitted to a part 54 of an object 34 to evaporate a material of the emitted part. The surface material is evaporated with the pulse of a plurality of laser beam spots of about 1 mm in diameter to be formed by the laser beam on this surface, and a deep area with the residual compression stress extending into the object from the surface 54 to be subjected to the laser shock peening. Water flows like a curtain over the surface subjected to the laser beam while moving the object until the surface subjected to the laser shock peening is completely covered by the laser beam spots at least one time. The surface may be covered with a fusing coating suitable for generation of plasma.

    CRACK PREVENTIVE LASER SHOCK PEENING
    3.
    发明专利
    CRACK PREVENTIVE LASER SHOCK PEENING 失效

    公开(公告)号：JPH11254157A

    公开(公告)日：1999-09-21

    申请号：JP34628498

    申请日：1998-12-07

    Applicant: GEN ELECTRIC

    Inventor： ROCKSTROH TODD JAY ,  WRIGHT III PHILEMON KENNARD

    IPC: B23K26/00 ,  B23K26/14 ,  C21D7/06 ,  C21D10/00 ,  F01D5/28

    Abstract: PROBLEM TO BE SOLVED: To provide a novel laser shock peening method of a hard metallic parts. SOLUTION: An article is provided with a surface 54 at least a part of which is subjected to the laser beam shock peening(LSP), and a plurality of projections which are extended into the article inside from the surface, separated from each other in the three-dimensional manner, and subjected to LSP. The projections are deep residual compression stress due to LSP, and are extended into the article inside from circular laser beam spots separate from each other on the surface, and the spots are not overlapped. In the LSP method, the laser beam is emitted to different points on the surface 54 of at least a part of the article, and the material of the surface 54 close to the laser beam spot is evaporated to be formed by the laser beam, water flows in a curtain-like manner on the surface 54 subjected to the laser beam, the laser beam is emitted so as to form a plurality of projections which are extended into the article from the spot, subjected to the LSP, and separated from each other in a three- dimensional manner, and the projections have the deep residual compression stress.

    METHOD TO FORM COOLING HOLE
    4.
    发明专利
    METHOD TO FORM COOLING HOLE 失效

    公开(公告)号：JP2001254633A

    公开(公告)日：2001-09-21

    申请号：JP2001009594

    申请日：2001-01-18

    Applicant: GEN ELECTRIC

    Inventor： ROCKSTROH TODD JAY ,  SCHEIDT WILBUR DOUGLAS ,  ASH CLARENCE ALBERT

    IPC: F01D5/18 ,  B23K26/00 ,  B23K26/03 ,  B23K26/06 ,  B23K26/14 ,  B23K26/38 ,  F01D9/02 ,  F02C7/00

    Abstract: PROBLEM TO BE SOLVED: To form a cooling hole on a gas turbine engine part. SOLUTION: This method includes a step to form a hole extending between a first surface of a part and a second surface of the part facing against this first surface on the part and a step to supply pressure air to the hole from the second surface of the part. This method also includes a step to detect a parameter displaying a flow rate of air passing through the hole. Additionally, this method includes a step to enlarge the hole until the parameter to be detected shows the previously selected flow rate of air passing through the hole.

    DMLM BUILD RELEASE LAYER AND METHOD OF USE THEREOF
    5.
    发明专利
    DMLM BUILD RELEASE LAYER AND METHOD OF USE THEREOF 未知

    公开(公告)号：ZA201804489B

    公开(公告)日：2020-08-26

    申请号：ZA201804489

    申请日：2018-07-05

    Applicant: GEN ELECTRIC

    Inventor： ROCKSTROH TODD JAY

    Abstract: A method for additive manufacturing utilizing a build plate with a release layer is provided. The method includes irradiating a first layer of powder in a powder bed to form a first fused region over a support. The first release layer is provided between the first fused region and the support. The method also includes providing a given layer of powder over the powder bed and irradiating the given layer of powder in the powder bed to form a given fused region. Providing the given layer of powder over the powder bed and irradiating the given layer of powder in the powder bed to form a given fused region are repeated until the object is formed in the powder bed. The object may be formed fusing individual layers with irradiation by laser or electron beam, or by binder jetting. The method further includes separating the object from the support by melting or dissolving the first release layer.

    APPARATUS AND METHOD FOR DIRECT WRITING OF SINGLE CRYSTAL SUPER ALLOYS AND METALS
    6.
    发明专利
    APPARATUS AND METHOD FOR DIRECT WRITING OF SINGLE CRYSTAL SUPER ALLOYS AND METALS 未知

    公开(公告)号：CA2939733C

    公开(公告)日：2019-09-17

    申请号：CA2939733

    申请日：2016-08-18

    Applicant: GEN ELECTRIC

    Inventor： CARTER WILLIAM THOMAS ,  ROCKSTROH TODD JAY ,  KONITZER DOUGLAS GERARD

    IPC: C30B13/28 ,  C30B13/24

    Abstract: Methods for direct writing of single crystal super alloys and metals are provided. The method can include: heating a substrate (23) positioned on a base plate (22) to a predetermined temperature using a first heater (24); using a laser (26) to form a melt pool (34) on a surface of the substrate (23); introducing a superalloy powder (32) to the melt pool (34); measuring the temperature of the melt pool (34); receiving the temperature measured at a controller (40); and using an auxiliary heat source (41) in communication with the controller (40) to adjust the temperature of the melt pool (34). The predetermined temperature is below the substrate's melting point. The laser (26) and the base plate (22) are movable relative to each other, with the laser (26) being used for direct metal deposition. An apparatus (20) is also generally provided for direct writing of single crystal super alloys and metals.

    SYSTEM AND METHOD FOR MONITORING DRILLING PROCESS PARAMETERS AND CONTROLLING DRILLING OPERATION
    9.
    发明专利
    SYSTEM AND METHOD FOR MONITORING DRILLING PROCESS PARAMETERS AND CONTROLLING DRILLING OPERATION 未知

    公开(公告)号：SG135168A1

    公开(公告)日：2007-09-28

    申请号：SG2007015456

    申请日：2007-03-02

    Applicant: GEN ELECTRIC

    Inventor： ROCKSTROH TODD JAY ,  SCHEIDT WILBUR DOUGLAS ,  ASH CLARENCE A ,  SOMERS RALPH MORGAN ,  MORABITO JOHN LOUIS

    Abstract: A system (210, 510, 610) which broadly comprises: (a) a plurality of sensors (222, 226, 522, 526, 532, 654) for monitoring one or more relevant laser drilling process parameters other than only breakthrough (262, 372, 728) during operation of a laser drill (105); and (b) optionally a controller (246) that uses the one or more monitored laser drilling process control parameters to control a laser drill during operation (105) thereof. Also disclosed is a method which broadly comprises the following steps: (a) providing a plurality of sensors (222, 226, 522, 526, 532, 654) capable of monitoring one or more relevant laser drilling process parameters other than only breakthrough (262, 372, 728) during a laser drilling operation (105); (b) monitoring with the plurality of sensors (222, 226, 522, 526, 532, 654) one or more relevant laser drilling process parameters other than only breakthrough (262, 372, 728) during the laser drilling operation (105); and (c) optionally using the one or more monitored laser drilling process parameters to control (246) the laser drilling operation (105).

    Single head laser high throughput laser shock peening
    10.
    发明专利
    Single head laser high throughput laser shock peening 未知

    公开(公告)号：GB2405116B

    公开(公告)日：2006-04-19

    申请号：GB0418548

    申请日：2004-08-19

    Applicant: GEN ELECTRIC

    Inventor： ROCKSTROH TODD JAY

    IPC: B23K26/00 ,  B23K26/06 ,  B23K26/14 ,  C21D10/00 ,  C23C26/00 ,  H01S3/00

    Abstract: A laser unit in a laser shock peening apparatus for generating a primary laser beam along a primary beam path includes a pulsed free running oscillator with only a single lasing rod. An electro-optic switch external to the free running laser oscillator is operably disposed along the primary beam path to block the initial slow rise time of the primary laser beam from the free running oscillator and reject energy away from the primary beam path. At least one optical transmission circuit is used to form at one stationary laser beam from the primary laser beam and direct the stationary laser beam towards at least one laser shock peening target area. A delay generator controllably connected to the electro-optic switch is used to reject energy away from the primary beam path along a dump path to a dump and sharpen pulses of the primary laser beam.

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