Cutting insert, tool and method of machining a workpiece

B - Operations – Transporting – 23 – C

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B23C 5/20 (2006.01)

Patent

CA 2614949

During the machining of a workpiece, in order to achieve a high surface quality of the machined workpiece, an at least hexagonal cutting insert is provided in which the edges forming the lips (16A,B) are arranged alternately at a small angle (.alpha.) and a large angle (~) relative to one another and are designed alternately as roughing lips (16A) and finishing lips (16B). This ensures that a finishing lip (16B), following a roughing lip (16A), of the cutting insert (8) is effective over a greater length.

La présente invention concerne un procédé permettant d'obtenir une haute qualité de surface d'une pièce à usiner lors d'un usinage par enlèvement de copeaux. Ce procédé consiste à utiliser un élément de coupe à insérer qui présente au moins six pans. Les bords formant les arêtes coupantes (16A, B) sont placés alternativement de manière à former un petit angle (.alpha.) et un grand angle (.beta.) les uns par rapport aux autres et sont conçus de manière alternée sous forme d'arête coupante de dégrossissage (16A) et d'arête coupante de finissage (16B). L'arête coupante de finissage (16B) qui suit une arête coupante de dégrossissage (16A) de l'outil de coupe (8) s'en trouve ainsi efficace sur une plus grande longueur.

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