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    Plasma transferred wire arc thermal spray apparatus and method
    11.
    发明授权
    Plasma transferred wire arc thermal spray apparatus and method 失效

    公开(公告)号：US5808270A

    公开(公告)日：1998-09-15

    申请号：US799242

    申请日：1997-02-14

    Applicant: Daniel R. Marantz ,  Keith A. Kowalsky ,  James R. Baughman ,  David J. Cook

    Inventor： Daniel R. Marantz ,  Keith A. Kowalsky ,  James R. Baughman ,  David J. Cook

    IPC: B05D7/22 ,  B05B7/18 ,  B05B7/22 ,  B05B13/06 ,  B23K10/02 ,  C23C4/12 ,  B23K10/00

    CPC classification number: B23K10/027 ,  B05B13/0636 ,  B05B7/224

    Abstract: A plasma transferred wire arc thermal spray apparatus and method producing an extended-arc and supersonic plasma jet stream for applying a dense metallic coating on a substrate, such as a concave internal surface of a bore. The apparatus includes a plasma generating torch assembling having a cathode and an anode nozzle surrounding the cathode and a wire feeder which continuously feeds the tip of a wire feedstock opposite a constricted nozzle orifice and wherein the wire feedstock is maintained at the same positive electrical potential as the nozzle. Plasma gas is directed into the nozzle, preferably generating a vortex flow around the cathode and exiting the restricted nozzle orifice. The improved apparatus includes a pilot power supply and a high voltage or high frequency power supply which initiates the electric arc and the constricted plasma arc and a separate main power supply which extends the constricted plasma arc to the wire tip. In the disclosed bore coating apparatus and method, the plasma torch assembly is rotated about the longitudinal axis of the wire feedstock while maintaining the electrical connection between the wire feedstock and the nozzle. The apparatus further includes an annular conical port surrounding the restricted nozzle orifice connected to a second gas source which generates an annular conical gas stream surrounding the wire tip having a point of intersection spaced downstream of the wire tip and the second gas is further directed to the wire feed guide to cool the assembly.

    Method for thermal spray coating interior surfaces using deflecting gas nozzles
    12.
    发明授权
    Method for thermal spray coating interior surfaces using deflecting gas nozzles 失效
    使用偏转气体喷嘴热喷涂内表面的方法

    公开(公告)号：US5714205A

    公开(公告)日：1998-02-03

    申请号：US459789

    申请日：1995-06-02

    Applicant: Daniel R. Marantz ,  Keith A. Kowalsky

    Inventor： Daniel R. Marantz ,  Keith A. Kowalsky

    IPC: B05B7/08 ,  B05B7/22 ,  B05B13/06 ,  B23K9/04 ,  C23C4/12 ,  C23C4/14 ,  B05D1/08 ,  H05H1/34

    CPC classification number: B23K9/048 ,  B05B13/06 ,  B05B7/0861 ,  B05B7/224 ,  C23C4/131 ,  C23C4/14 ,  B05B13/0636

    Abstract: A method of thermal spray coating a surface with a metal coating material includes the provision of a nozzle about a thermal spray coating apparatus, such as a two wire electric-arc apparatus. The nozzle includes a plurality of ports facing generally radially inwardly towards a coating material particle stream, such as an atomized molten metal stream of a two-wire arc thermal spray apparatus. The ports sequentially receive a deflecting gas flow, such that the direction moves circumferentially about the axis of the particle stream. The deflecting gas entrains the coating material and carries it radially to the surface of the part to be coated or the nozzle assembly. By utilizing a plurality of valve ports, one simplifies the assembly over prior art systems which have rotated the part to be coated. In one embodiment of this invention, a valve disk selectively communicates a compressed gas to the ports sequentially. In a second embodiment, each of the ports are associated with individual electrically operated valves which are sequentially opened to achieve the changing direction of the deflecting gas flow. A method and apparatus for simultaneously coating a plurality of bores main body, such as an engine block, is also disclosed. The apparatus includes a plurality of deflecting nozzles which are simultaneously inserted in each of the bore. The preferred method includes initiating an axial particulate coating stream, prior to inserting the deflecting nozzles in the bores, then inserting the nozzles in the bores and deflecting stream radially, to coat all of the bores simultaneously.

    Abstract translation: 用金属涂层材料热喷涂表面的方法包括提供关于热喷涂装置的喷嘴，例如双线电弧装置。 喷嘴包括多个面向大致径向向内朝向涂层材料颗粒流（例如两线弧形热喷涂装置的雾化熔融金属流）的端口。 端口顺序地接收偏转气流，使得该方向围绕颗粒流的轴线周向移动。 偏转气体夹带涂层材料并将其径向运送到待涂覆部件或喷嘴组件的表面。 通过利用多个阀口，可以简化与已经旋转待涂覆部件的现有技术系统的组装。 在本发明的一个实施例中，阀盘选择性地将压缩气体顺序地连通到端口。 在第二实施例中，每个端口与单独的电动阀相关联，这些电动阀顺序打开以实现偏转气流的改变方向。 还公开了一种用于同时涂覆多个孔体的方法和装置，例如发动机缸体。 该装置包括同时插入每个孔中的多个偏转喷嘴。 优选的方法包括在将偏转喷嘴插入孔之前引发轴向颗粒涂覆流，然后将喷嘴插入孔中并径向偏转流，同时涂覆所有的孔。

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