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Title: Debris-less method and apparatus for forming apertures in hollow metallic articles

Abstract

This invention is a method for forming an aperture in a wall of a hollow metallic article without introducing metallic debris therein. In a typical operation, an annular groove is formed in an exterior portion of the wall. The groove defines an annular wall segment, and the bottom of the groove is shaped to slope downwardly away from the segment to form a tapered annular web which connects the segment to the wall. Any suitable coupling is attached to the outer face of the segment, as by welding. Pull then is applied to the coupling to effect circumferential breakage of the web, thus forming a removable single-piece wall fragment consisting of the web and segment. The fragment and the coupling member attached thereto then are removed from the wall.

Inventors:
;
Issue Date:
OSTI Identifier:
6589576
Assignee:
Department of Energy TIC; ERA-06-020698; EDB-81-063522
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; DUCTS; OPENINGS; FABRICATION; PIPES; TUBES; METALS; ELEMENTS 420200* -- Engineering-- Facilities, Equipment, & Techniques

Citation Formats

Jordan, C.L., and Chodelka, E.J. Debris-less method and apparatus for forming apertures in hollow metallic articles. United States: N. p., 1980. Web.
Jordan, C.L., & Chodelka, E.J. Debris-less method and apparatus for forming apertures in hollow metallic articles. United States.
Jordan, C.L., and Chodelka, E.J. Tue . "Debris-less method and apparatus for forming apertures in hollow metallic articles". United States.
@article{osti_6589576,
title = {Debris-less method and apparatus for forming apertures in hollow metallic articles},
author = {Jordan, C.L. and Chodelka, E.J.},
abstractNote = {This invention is a method for forming an aperture in a wall of a hollow metallic article without introducing metallic debris therein. In a typical operation, an annular groove is formed in an exterior portion of the wall. The groove defines an annular wall segment, and the bottom of the groove is shaped to slope downwardly away from the segment to form a tapered annular web which connects the segment to the wall. Any suitable coupling is attached to the outer face of the segment, as by welding. Pull then is applied to the coupling to effect circumferential breakage of the web, thus forming a removable single-piece wall fragment consisting of the web and segment. The fragment and the coupling member attached thereto then are removed from the wall.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {6}
}