Cutting tool with stress splitter

B - Operations – Transporting – 26 – D

Patent

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Details

B26D 1/00 (2006.01)

Patent

CA 2627495

A cutting tool (10) includes a tool body (14) having a plurality of insert receiving pockets (20) and at least one cutting insert (12) mounted in each pocket. Each pocket (20) includes a pocket base wall (22), a side wall (26) and a stress relief groove (24). The tool body (14) also includes a top surface (34) including a first portion (28) and a second portion (29), and a stress splitter (36) that extends from the stress relief groove (24) and intersects the first and second portions (28, 29). The stress splitter (36) may be in the form of a sharp peak or ridge, a radiused peak, rounded mass or protuberance, and the like. The stress splitter (36) reduces a maximum amount of stress in an area of the stress relief groove (24) during a machining operation.

L'invention concerne un outil de coupe (10) qui comprend un corps d'outil (14) ayant une pluralité de poches (20) réceptrices d'insert et au moins un insert de coupe (12) dans chaque poche. Chaque poche (20) comprend une paroi de base (22) de la poche, une paroi latérale (26) et une rainure (24) de détente des contraintes. Le corps d'outil (14) comprend aussi une surface sommitale (34) comprenant une première partie (28) et une seconde partie (29) et un répartiteur de contraintes (36) qui s'étend à partir de la rainure (24) de détente des contraintes et recoupe les première et seconde parties (28, 29). Le répartiteur de contraintes (36) peut avoir la forme d'un pic ou d'une crête aigu, d'un pic arrondi, d'une masse ou d'une protubérance arrondie, ou similaire. Pendant une opération d'usinage le répartiteur de contraintes (36) réduit une quantité maximale de contraintes dans la zone de la rainure (24) de détente des contraintes.

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