Method and apparatus for forming a hole for using cooling air in

Details Method and apparatus for forming a hole for using cooling air in Method and apparatus for forming a hole for using cooling air in

1995-07-20

1997-12-30

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912139, 21912158, 21912149, B23K 1000

Patent

active

057033404

ABSTRACT:
A hole forming apparatus for forming a hole through the side wall of a hollow elongated work without any adhesion of dross generated not only during hole forming operation to the inner wall surface of the work but also without any burning of a rust preventing oil. To cool the working location, cooling air is blown through the opening end of the work so as to generate a stream of cooling air in the interior of the work.

REFERENCES:
patent: 4063059 (1977-12-01), Brolund et al.
patent: 4407404 (1983-10-01), Rise et al.
patent: 5026965 (1991-06-01), Ohe et al.
patent: 5073694 (1991-12-01), Tessier et al.
patent: 5345057 (1994-09-01), Muller
patent: 5436426 (1995-07-01), Nerz et al.

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