Sandvik Coromant

The present invention relates to a turning method for machining a metal workpiece with a turning tool comprising a cutting edge, which cutting edge includes a cutting nose and a clearance corner, wherein the method comprises the steps of: - determining a final machined profile of the metal workpiece, wherein the final machined profile comprises a main surface and a shoulder surface; - determining a cutting depth; - rotating the metal workpiece around an axis of rotation; - cutting the metal workpiece with the cutting nose by, - a) moving, at the cutting depth, the cutting nose along the main surface, towards the shoulder surface, - b) moving the cutting nose further toward the shoulder surface until the clearance corner is positioned on the shoulder surface, - c) moving the cutting nose away from the shoulder surface, - d) moving the cutting nose toward the shoulder surface until the clearance corner is positioned on the shoulder surface, - e) moving the cutting nose away from the shoulder surface, wherein any of the steps b - e comprises moving the cutting nose towards the main surface, - f) moving, at the cutting depth, the cutting nose along the main surface, further away from the shoulder surface.

An exchangeable head drill support body (1) comprises at an axially forward end and two axially forwardly extending towers (20). The towers are spaced apart about the longitudinal axis (10). Each tower has a respective non-threaded through hole (21), extending radially. The hole is defined by a respective inner peripheral surface (71) having a first portion (31) and a, radially outside provided, second portion (32). In each of the towers, a first cross-section (72) of the inner peripheral surface of the first portion in a first tangential plane (73) has a center of gravity (74). In each of the towers, the second portion presents geometrical structures that are non-symmetric with respect to a first radial axis (13). The first radial axis passes the respective center of gravity.A threaded insert.An exchangeable head drill support body arrangement.

A drill tip screw (3) for fastening of a drill tip (2) to an exchangeable head drill support body (1) has a general extension in an axial direction (10). The drill tip screw comprises a screw head (12) at a first axial end (11) of the drill tip screw and an outer threading (18) at a second axial end (19) of the drill tip screw. The second axial end is opposite to the first axial end. The drill tip screw further comprises a center portion (15), wherein the center portion is rotationally symmetric. The drill tip screw further comprises a first tapered portion (14) having its widest end (21) connected in one piece to the center portion. The first tapered portion is rotationally symmetric. An axial cross-section of the first tapered portion presents a concave surface shape.

The invention relates to a coated cutting tool comprising a substrate body and a coating, the coating comprises a sequence of layers, in the order from the substrate body surface, being one or more metal nitride layer(s) (M), the total thickness of the one or more metal nitride layer(s) (M) is from 0.5 to 8 µm, followed by a layer of Cr<1-x>Al<x>N, 0.75≤x≤0.85, as an uppermost layer having a thickness of from 0.1 to 2 µm, the layer of Cr<1-x>Al<x>N is of a single phase B1 cubic structure. The invention also relates to a method of producing the coated cutting tool.

The invention relates to a cutting tool comprising a cemented carbide substrate wherein the substrate comprises WC, eta phase in an amount of 1 to 10 vol% and between 3 and 20 wt% of a Co-based metal binder. The metal binder further comprises Al, Ni and possibly Cr so that: the weight ratio Ni/(Ni+Co) in the cemented carbide is between 0.1 and 0.5, the weight ratio Cr/(Cr+Ni+Co) in the cemented carbide is between 0 and 0.1 and the weight ratio AI/(AI+Cr+Ni+Co) in the cemented carbide is between 0.01 and 0.07. The composition gives the cemented carbide improved properties also when coated at higher temperatures.

The invention relates to a method for machining a surface of a metal workpiece (20) using a turning tool (10) comprising a tool body and a first cutting insert (1) arranged at a front end (8) of the tool body, wherein the method comprises:- a facing step (31) in which the turning tool is moved along a radial direction (X) such that the first cutting insert (1) cuts chips from a radial portion (22) of the metal workpiece at an entering angle (E1) of a first cutting edge (2) of the first cutting insert of 10°- 45°;- a first entering step (32) in which the turning tool, before the first cutting insert reaches a longitudinal portion of the workpiece, is moved away from the radial portion along a first entering path (L1) that is transverse to both a longitudinal direction (Z) and the radial direction (X), such that the first cutting insert cuts chips from the longitudinal portion (21) of the metal workpiece at an entering angle (E2) of a second cutting edge (3) of the first cutting insert of 45°-120°; and- a first longitudinal turning step (33) in which the turning tool (10) is moved along the longitudinal direction (Z) away from the radial portion (22) such that the first cutting insert (2) cuts chips from the longitudinal portion (21) of the metal workpiece (20) at an entering angle (E3) of the second cutting edge (3) of 10°-45°.

The present disclosure relates to a method of making a powder of dense and spherically shaped cemented carbide or cermet particles. The present disclosure also relates to a powder produced by the method and use of said powder in additive manufacturing such as 3D printing by the binder jetting technique.

The invention relates to a method for machining a surface of a metal workpiece (20) using a turning tool (10) comprising a tool body and a first cutting insert (1) arranged at a front end (8) of the tool body, wherein the method comprises:- a first entering step (31) in which the turning tool (10) is moved towards a first end (41) of a longitudinal portion (21) of the workpiece along a first entering path (L1) that is transverse to both a longitudinal direction (Z) and a radial direction (X), such that the first cutting insert (1) cuts chips from the longitudinal portion (21) of the metal workpiece (20) at an entering angle (E1) of a first cutting edge (2) of the first cutting insert of 60°-120°; and- a longitudinal turning step (36) in which the turning tool (10) is moved along the longitudinal direction (Z) away from the first end (41) and towards a second end (42) of the longitudinal portion (21) such that the first cutting insert (1) cuts chips from the longitudinal portion (21) of the metal workpiece (20) at an entering angle (E2) of a second cutting edge (3) of the first cutting insert of 10°- 45°.

The invention relates to a method for machining a surface of a metal workpiece (20) using a turning tool (10) comprising a tool body and first and second cutting inserts (1, 11) arranged at a front end (8) of the tool body, wherein the method comprises:- an entering step (31) in which the turning tool (10) is moved along an entering path (L1) that is transverse to both a longitudinal direction (Z) and a radial direction (X), such that both the first cutting insert (1) and the second cutting insert (11) engage the workpiece and cut chips from a longitudinal portion (21) of the workpiece at entering angles of their respective active main cutting edges of 45°-120°; and- a longitudinal turning step (32) in which the turning tool (10) is moved along the longitudinal direction (Z) such that the first and second cutting inserts (1, 11) cut chips from the longitudinal portion (21) at entering angles (E2) of their respective active main cutting edges of 10°- 45°.

The present invention relates to the use of a cutting tool for machining in aluminum wherein the cutting tool comprises a cemented carbide substrate comprising WC and between 3 and 20 wt% Fe-based metal binder wherein the metal binder comprises at least 50 wt% but less than 95 wt% Fe.