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    Electron beam hole-drilling
    5.
    发明专利
    Electron beam hole-drilling 未知

    公开(公告)号：GB2161103A

    公开(公告)日：1986-01-08

    申请号：GB8416861

    申请日：1984-07-03

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HOWARD CURTIS GILMORE ,  YAWORSKY CHESTER EDWIN ,  JORDAN LEST WARREN ,  ZAMPINO FRANK LOUIS

    IPC: B23K15/08 ,  B23K15/00

    Abstract: When drilling very small diameter holes in workpieces 24, there is a great tendency for expulsed workpiece material to travel back along the electron beam path (20, Fig. 1) and to deposit as debris within the interior of the gun 22. The debris is caused to mostly land at a recess 54 in the rim 60 of a rotatable interior shield 44, positioned adjacent the beam path inside the gun. The deflection angle ( alpha ) of the electron beam is precisely adjusted so that the expulsed workpiece material lands in the recess, from whence it is removed by a scraper. A tab 64 is placed within the recess at the rim of the shield, and helps remove small amounts of deposit which still adhere to stationary parts of the electron beam gun system adjacent to the shield. In this embodiment, a resilient scraper such as a wire brush 66, is used to remove adhering debris from the rim of the shield.

    6.
    发明专利
    未知

    公开(公告)号：NO151611C

    公开(公告)日：1985-05-08

    申请号：NO790962

    申请日：1979-03-22

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HOWARD CURTISS GILMORE ,  JORDAN LESTER WARREN ,  YAWORSKY CHESTER EDWIN

    IPC: B23K15/08 ,  B23K26/18 ,  B23K15/00

    Abstract: Disclosed is an electron beam drilling process in which the workpiece surface first penetrated by the beam is coated with a stop-off material having the required high temperature resistance for preventing formation of burrs around the perimeter of the hole from hot molten spatter which is ejected from the entrance to the hole during the drilling operation. A preferred stop-off material is a substantially continuous layer of boron nitride on the first penetrated surface of the workpiece.

    7.
    发明专利
    未知

    公开(公告)号：NO790962L

    公开(公告)日：1979-09-25

    申请号：NO790962

    申请日：1979-03-22

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HOWARD CURTISS GILMORE ,  JORDAN LESTER WARREN ,  YAWORSKY CHESTER EDWIN

    IPC: B23K15/08 ,  B23K26/18 ,  B23K

    Abstract: Disclosed is an electron beam drilling process in which the workpiece surface first penetrated by the beam is coated with a stop-off material having the required high temperature resistance for preventing formation of burrs around the perimeter of the hole from hot molten spatter which is ejected from the entrance to the hole during the drilling operation. A preferred stop-off material is a substantially continuous layer of boron nitride on the first penetrated surface of the workpiece.

    Apparatus for drilling a hole with an electron beam
    9.
    发明专利
    Apparatus for drilling a hole with an electron beam 未知

    公开(公告)号：DE3428207A1

    公开(公告)日：1986-02-06

    申请号：DE3428207

    申请日：1984-07-31

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： HOWARD CURTISS GILMORE ,  JORDAN LESTER WARREN ,  YAWORSKY CHESTER EDWIN ,  ZAMPINO FRANK LOUIS

    IPC: B23K15/08 ,  H01J37/31 ,  B23K15/00 ,  H01J37/09

    Abstract: During the drilling of holes of very small diameter in workpieces 24 by means of an electron-beam drilling machine, the material 40 discharged from the workpiece has a great tendency to travel back along the beam path and settle as a deposit 50 in the interior of the electron gun 22. Provision is made for the deposit to settle for the most part in a recess 54 at the margin 60 of a rotatable, inner diaphragm 44 which is arranged near the beam path inside the electron gun. The deflection angle alpha of the electron beam is accurately set so that the material discharged from the workpiece settles in the recess, from which the material is removed by means of a wiper. A nose 64 is arranged in the recess at the margin of the diaphragm and helps to remove small quantities of deposits 50 which are still adhering to the stationary parts of the electron gun near the diaphragm. In this embodiment, an elastically flexible wiper, such as, for example, a wire brush 66, is used in order to remove adhering deposits from the margin of the diaphragm.

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