Smoothing round internal passages of additively manufactured parts using metallic spheres

    公开(公告)号:US11148248B2

    公开(公告)日:2021-10-19

    申请号:US15957873

    申请日:2018-04-19

    Abstract: A method for smoothing surface roughness within an internal passageway is disclosed. In various embodiments, the method comprises developing a first sphere progression through a length of the internal passageway, each sphere within the first sphere progression having a first sphere diameter greater than or equal to a diameter of the internal passageway; and developing a second sphere progression through the length of the internal passageway, each sphere within the second sphere progression having a second sphere diameter greater than the first sphere diameter, whereby the inner surface of the internal passageway is smoothed, first by the first sphere progression and then by the second sphere progression.

    SMOOTHING ROUND INTERNAL PASSAGES OF ADDITIVELY MANUFACTURED PARTS USING METALLIC SPHERES

    公开(公告)号:US20190321938A1

    公开(公告)日:2019-10-24

    申请号:US15957873

    申请日:2018-04-19

    Abstract: A method for smoothing surface roughness within an internal passageway is disclosed. In various embodiments, the method comprises developing a first sphere progression through a length of the internal passageway, each sphere within the first sphere progression having a first sphere diameter greater than or equal to a diameter of the internal passageway; and developing a second sphere progression through the length of the internal passageway, each sphere within the second sphere progression having a second sphere diameter greater than the first sphere diameter, whereby the inner surface of the internal passageway is smoothed, first by the first sphere progression and then by the second sphere progression.

    MANDRELS AND METHODS FOR ABRASIVE FLOW MACHINING

    公开(公告)号:US20190321935A1

    公开(公告)日:2019-10-24

    申请号:US15957885

    申请日:2018-04-19

    Abstract: A method for smoothing surface roughness within a passageway is disclosed. In various embodiments, the method comprises flowing an abrasive media through the passageway and positioning a mandrel within the passageway, the mandrel being sized to create a gap between an outer surface of the mandrel and an inner surface of the passageway, wherein the abrasive media is caused to flow through the gap, abrading the inner surface of the passageway.

    Ceramic coating polishing method
    18.
    发明授权

    公开(公告)号:US10252395B2

    公开(公告)日:2019-04-09

    申请号:US14623351

    申请日:2015-02-16

    Abstract: A method of polishing an outer surface of a ceramic coated gas turbine engine component includes applying a rotating diamond brush to the outer surface. The brush is configured to achieve a uniform finish of 150 microinches Ra or less over the surface. The brush contains diamond impregnated bristles, and is affixed to a rotary head of a robotic arm. A force sensing controller limits brush forces against the component. The component disclosed is a hot section turbine vane designed for directional control of high temperature, high-pressure combustion gases, but the method may be applied to other components contained within such aerospace applications. The polished coating provides an improved thermal barrier for maintaining structural integrity of the component in environments having temperatures ranging up to 2,000 degrees Celsius. The method limits abrasive removal of ceramic material to only 0.0005 to 0.00075 inch, and saves time and expense over past practices.

    LASER ROUGH DRILL AND FULL EDM FINISH FOR SHAPED COOLING HOLES

    公开(公告)号:US20210060709A1

    公开(公告)日:2021-03-04

    申请号:US16550807

    申请日:2019-08-26

    Abstract: A process of forming a shaped cooling passage in an article comprising positioning the article within a laser drilling apparatus; laser ablating a near net-shaped cooling passage having a meter section and a diffuser section; forming a re-recast on an interior wall of said cooling passage in both the meter section and the diffuser section; positioning the article within an electric discharge machining apparatus; and electric discharge machining said re-cast from said interior wall at both the meter section and diffusor section with the same electric discharge machine electrode to form a finished shaped cooling passage.

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