Backer for electron beam hole drilling

Details Backer for electron beam hole drilling Backer for electron beam hole drilling

1978-12-11

1980-12-16

Albritton, C. L.

Electric heating

Metal heating

By arc

B23K 2700

Patent

active

042399548

ABSTRACT:
Disclosed is an electron beam hole drilling process in which the workpiece surface where the hole exits is covered with a backer comprising particulate bonded to itself and the exit surface by a binding agent. The backer enables a hole having substantial uniform symmetry along its length to be drilled and is particularly useful for hollow parts and contoured surfaces. Backers removable by liquifying, melting dissolution, leaching and the like, are particularly useful for inaccessible exit surfaces. In a preferred embodiment the backer is comprised of a nonmetallic particulate such as glass while the binder is a soluble silicate.

REFERENCES:
patent: 3410979 (1968-11-01), Larsson
patent: 3473599 (1969-10-01), Rose
patent: 3649806 (1972-03-01), Konig
patent: 3683995 (1972-08-01), Zifferer
patent: 3738957 (1973-06-01), Iler
patent: 3773776 (1973-11-01), Iler
patent: 3802902 (1974-04-01), Turner et al.
patent: 3892579 (1975-07-01), Mabie, Jr.

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