Method of making a hole in a thick-walled metal material
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United States of America Patent
Stats
-
Nov 27, 1984
Grant Date -
N/A
app pub date -
Sep 16, 1982
filing date -
Jun 11, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process of making a hole in a metal material of a large thickness comprises bringing the tip of an arc electrode wire into contact with the metal material while laterally reciprocating the arc electrode wire to thereby form an entry path on one side of the arc electrode wire and an exit path on the other side of the arc electrode wire within the hole, and causing a pressurized fluid to be introduced into the entry path, guided to the bottom of the hole and the exit path, and discharged out of the hole together with the molten metal lumps.
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