Abstract: A metal cutting insert that is primarily intended for turning operations includes an upper surface, a lower surface substantially parallel with the upper surface, and at least three side surfaces extending between the upper and lower surfaces. A transition between two adjacent side surfaces forms a rounded nose radius surface at a cutting insert corner. The cutting insert includes a peripheral land bridging the upper and side surfaces at least at the corner portion at a chamfer angle. An intersection of the land and the nose radius surface forms a nose cutting edge. The nose cutting edge is defined by at least one radius. The cutting corner includes at least one curved wiper edge. The chamfer angle in a cross-section at the nose cutting edge is smaller than the chamfer angle in a cross-section a distance away from the nose cutting edge. The chamfer angle has a minimum at a bisector of the corner portion.

Abstract: The present invention relates to a metal cutting insert that is primarily intended for turning operations. The cutting insert comprises an upper surface, a lower surface substantially parallel with the upper surface, and at least three side surfaces extending between the upper and lower surfaces. A transition between two adjacent side surfaces forms a rounded nose radius surface at a cutting insert corner. The cutting insert comprises a peripheral land bridging the upper and side surfaces at least at the corner portion at a chamfer angle. An intersection of the land and the nose radius surface forms a nose cutting edge. The nose cutting edge is defined by at least one radius. The cutting corner comprises at least one curved wiper edge. The chamfer angle in a cross-section at the nose cutting edge is smaller than the chamfer angle in a cross-section a distance away from the nose cutting edge. The chamfer angle has a minimum at a bisector of the corner portion.

Abstract: The wear condition of a milling tool is determined by detecting vibrations of the milling tool and a metal workpiece and generating wavelet coefficients which are utilized to evaluate the wear condition of the workpiece. The vibrations are detected at several locations along the metal workpiece or upon a different workpiece under comparable conditions and evaluating workpiece wear on the basis of changes in wear condition parameters at different locations and/or comparable cutting engagement between the milling tool and similar or different workpieces.

Abstract: In a method for monitoring the wear condition of a tool (2) during machining of a metal workpiece (4) by means of a machine tool (1) by detecting measuring signals generated during the machining process with the aid of at least one sensor (6) and by transforming said measuring signals detected by said sensor (6) into wavelet coefficients by means of a wavelet function, wherein the resultant wavelet coefficients are used for calculating wear condition parameters for the tool (2), it is provided that the vibrations, which are generated during the machining process, of a vibration system comprising at least the tool (2) and the metal workpiece (4) are detected by at least one vibration sensor (6).