B - Operations – Transporting – 23 – D
Patent
B - Operations, Transporting
23
D
B23D 79/02 (2006.01) B23K 7/00 (2006.01)
Patent
CA 2522723
A method and apparatus for removing burrs from inside slotted metal liners exposes the burrs to a high-intensity gas flame that effectively oxidizes or incinerates the burrs, without inducing undesirable temperature levels in the parent metal of the slotted liner. This is accomplished using a torch head assembly having multiple gas torch nozzles disposed radially around the circumferential perimeter of the torch head, such that when the torch head is passed through the interior of a slotted liner, the flames are directed toward the interior surface of the liner. Auxiliary oxygen is introduced at the nozzle outlets, resulting in a large increase in flame velocity and intensity and, in turn, an increase in the flame temperature. The auxiliary oxygen may be introduced through annular passages surrounding the nozzles, such that the auxiliary oxygen effectively forms a cylindrical curtain surrounding the flame at each nozzle.
L'invention concerne un procédé et un appareil permettant d'ébavurer des colonnes perdues à fentes en exposant les bavures à une flamme au gaz à haute densité qui oxydent ou incinèrent efficacement les bavures, sans induire des niveaux de température indésirables dans le métal de base de la colonne perdue à fentes. A cet effet, on emploie un ensemble chalumeau coupeur ayant plusieurs buses de disposées radialement autour du périmètre circonférentiel du chalumeau, de sorte que lorsque le chalumeau passe par l'intérieur d'une colonne perdue à fentes, les flammes se dirigent vers la surface intérieure de la colonne perdue. On introduit de l'oxygène auxiliaire par les orifices des buses afin d'augmenter considérablement la vitesse et l'intensité des flammes et d'élever la température des flammes. L'oxygène auxiliaire peut être introduit par des passages annulaires qui entourent les buses, de sorte que l'oxygène auxiliaire forme efficacement un rideau cylindrique qui enveloppe la flamme au niveau de chaque buse.
Regent Technologies Ltd.
Tomkins Donald V.
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