Tool for machining a workpiece

Abstract

Tool (10) for machining a workpiece, comprising: - a cutting insert (20); - a tool holder (12) which has a cutting insert receptacle (30) for receiving the cutting insert (20); and a fastening element (24) for fastening the cutting insert (20) to the tool holder (12); wherein the cutting insert (20) rests on a holder-side support surface (36) on the tool holder (12) when the tool (10) is mounted, the support surface extending transversely to a central axis (44) of the cutting insert receptacle (30), wherein one of the tool holder (12) and the cutting insert (20) has a first groove (60a), a second groove (60b) and a third groove (60c), and the other of the tool holder (12) and the cutting insert (20) has a first web (38a), a second web (38b) and a third web (38c) which engage in the grooves (60a, 60b, 60c) when the tool (10) is mounted, wherein the holder-side support surface (36) is defined by the grooves (60a, 60b,60c) or webs (38a, 38b, 38c) are divided into three sectors (40a, 40b, 40c) which are arranged circumferentially around the central axis (44) of the cutting insert holder (30), wherein the first web (38a) has a first web side surface (50a) and a second web side surface (50b) facing away from the first web side surface (50a) of the first web (38a), the second web (38b) has a first web side surface (50a) and a second web side surface (50b) facing away from the first web side surface (50a) of the second web (38b), and the third web (38c) has a first web side surface (50a) and a second web side surface (50b) facing away from the first web side surface (50a) of the third web (38c). has a web side surface (50b), wherein the first web side surface (50a) of the first web (38a) is a first sector (40a) of the three sectors (40a, 40b,40c) is facing and the second web side surface (50b) of the first web (38a) is facing a second sector (40b) of the three sectors (40a, 40b, 40c), wherein the first web side surface (50a) of the second web (38b) is facing the second sector (40b) and the second web side surface (50b) of the second web (38b) is facing a third sector (40c) of the three sectors (40a, 40b, 40c), and wherein the first web side surface (50a) of the third web (38c) is facing the third sector (40c) and the second web side surface (50b) of the third web (38c) is facing the first sector (40a), wherein the first groove (60a) is a first groove side surface (62a) and one of the first groove side surfaces (62a) has a second groove side surface (62b) opposite the first groove (60a), wherein the second groove (60b) has a first groove side surface (62a) and a second groove side surface (62b) opposite the first groove side surface (62a) of the second groove (60b),and wherein the third groove (60c) has a first groove side surface (62a) and a second groove side surface (62b) opposite the first groove side surface (62a) of the third groove (60c), wherein in the assembled state of the tool (10) each of the three grooves (60a, 60b, 60c) abuts an associated of the three webs (38a, 38b, 38c) with only one of its two groove side surfaces (62a, 62b) against one of the two web side surfaces (50a, 50b) of the associated web (38a, 38b, 38c) such that the first groove (60a) abuts the first web side surface (50a) of the first web (38a) with its first groove side surface (62a), and the second groove (60b) abuts either with its first groove side surface (62a) abuts the first web side surface (50a) of the second web (38b) or its second groove side surface (62b) abuts the second web side surface (50b) of the second web (38b),and the third groove (60c) with its second groove side surface (62b) abuts the second web side surface (50b) of the third web (38c).