Cutting tool assembly with replaceable spray nozzle housing

E - Fixed Constructions – 21 – C

Patent

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Details

E21C 35/187 (2006.01) E21C 35/18 (2006.01)

Patent

CA 2427936

A cutting tool assembly (10) includes a support block (12), a replaceable spray nozzle housing, a liquid seal tight insert ring (36) and first and second (28) fluid passages. The first fluid and second (28) fluid passage has an axis and extends between the concealable outer surface portion (22) and a first surface portion (20) of the support block (12). The first and second (28) fluid passages are substantially straight between the first (20) and second (22) outer surfaces so as to permit a drill to be inserted into the first and second (28) passage for cleaning. The cutting tool assembly (10) also includes a replaceable spray nozzle housing on the support block (12) having a cylindrical inlet portion that extends into the first fluid passage such that the spray nozzle is in fluid communication with the first fluid passage. A separate insert ring (36) independent of a tool holding wear protective sleeve is press fit into the rear portion of the support block (12) and forms an annular flow chamber section of the first fluid passage. The insert ring (36) may be readily removed in the field to permit cleaning of the first fluid passage.

L'invention concerne un ensemble d'outil de coupe (10) comprenant un bloc support (12), un boîtier de buse de pulvérisation remplaçable, un anneau à insertion d'étanchéité au liquide (36) et des premier et second (28) passages fluidiques. Les premier et second (28) passages fluidiques présentent un axe et s'étendent entre une seconde partie de surface extérieure occultable (22) et une première partie de surface (20) du bloc support (12). Les premier et second (28) passages fluidiques sont sensiblement droits entre les première (20) et seconde (22) surfaces extérieures, de manière à permettre l'insertion d'un trépan dans les premier et second (28) passages, aux fins de nettoyage. L'ensemble d'outil de coupe (10) comprend également un boîtier de buse de pulvérisation remplaçable sur le bloc support(12), ce boîtier présentant une partie d'entrée cylindrique s'étendant dans le premier passage fluidique, de manière que la buse de pulvérisation soit en communication fluidique avec le premier passage fluidique. Un anneau à insertion distinct (36) indépendant d'un outil maintenant un manchon de protection contre l'usure est comprimé de manière à s'adapter à la partie arrière du bloc support (12) et forme une section annulaire de chambre d'écoulement du premier passage fluidique. L'anneau à insertion (36) peut être facilement retiré dans le champ, de manière à permettre le nettoyage du premier passage fluidique.

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