Sandvik Coromant Patente

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 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 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 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 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 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 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.

The invention relates to a milling insert (100) for mounting in a shoulder milling tool. The milling insert (100) comprises an upper rake surface (103), a bottom surface and a side surface (104). A cutting edge (106) is formed between the side surface (104) and the rake surface (103). The cutting edge (106) comprises a major cutting edge (107a, 107b), a corner radius cutting edge (108a, 108b), a surface wiping cutting edge (109a, 109b) and a ramping cutting edge (110a, 110b). Below the surface wiping cutting edge (109a, 109b), a lower secondary clearance surface has a wiper seating angle η<w> and an upper primary clearance surface has a wiper overhang angle β<w>. The wiper overhang angle β<w> is equal to or larger than 70° and the wiper seating angle η<w> is equal to or larger than the wiper overhang angle β<w>. The invention also relates to a milling tool provided with such inserts.

A cutting insert (10) of a rotary drill tool (1) for cutting metal comprises a head (14) and a neck extending along a longitudinal axis (12). The head has an axially forward-facing cutting region (13). At least the neck is configured for enabling releasably mounting at a support body (11). The head is formed by at least two lobes (33) each having a radially outermost envelope surface (23). Each lobe comprises a radially and axially extending torque transfer surface (17) configured for abutment contact with a corresponding torque transfer surface(29) of the support body. In a plane extending perpendicular to the longitudinal axis, the torque transfer surface has an orientation relative to the radial direction (R<T>) at an angle (α) in the range 15 to 45°, or 22 to 35°, or 28 to 33°, or 28 to 29°. A corresponding support body and a rotary drill tool.

The invention relates to a tool body (1a) for a milling tool. The tool body (1a) including at least one pocket (5) for receiving a cutting insert. The pocket (5) comprises a bottom section (7) with a bottom support surface (8), a first side wall section (9) at a radial inner end (7d) of the bottom section (7) and a second side wall section (11) at an axial rear end (7b) of the bottom section (7). The first side wall section (9) comprises a radial support surface (10) extending in a first plane (P1) and the second wall surface (11) comprises an axial support surface (12) extending in a second plane (P2). In a plane extending in parallel with the bottom support surface (8), the first plane (P1) forms an angle a1 of 65-75° with the second plane (P2). The invention further relates to a milling tool comprising such a tool body.

The present invention relates to method of determining the edge radius, ER, of a cutting edge of a cutting tool using light diffraction. The method comprises the steps of subjecting the cutting edge of the cutting tool to light during a selected exposure time, t, such that light is diffracted by the edge rounding and wherein a light exposed region of the cutting tool is in line of sight from the light source and a shadow region of the cutting tool comprise diffracted light, detecting intensity of the diffracted light from the shadow region of the cutting tool, detecting the intensity in one or more detection points that covers the detection area, and summarizing the intensities detected in all the detection points and achieving the detected intensity, I(det), and determining the ER of the cutting edge by comparing the detected intensity, I(det), with stored intensity data, I(ref), wherein the stored intensity data I(ref) is representative of ER. Then invention also relates to a system for determining ER of a cutting edge of a cutting tool.

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The present invention relates to a cutting tool comprising a substrate at least partially coated with a coating, said coating comprises an α-Al<2>O<3> layer and at least one inner Ti(C,N) layer, said inner Ti(C,N) layer is located between a surface of the substrate and the α-Al<2>O<3> layer. The coating further comprises at least one outer Ti(C,N) layer located between the α-Al<2>O<3> layer and an outermost surface of the coating. There is an intermediate layer between the α-Al<2>O<3> layer and the outer Ti(C,N) layer, and said intermediate layer is a (Al,Ti)(C,O) layer with an average thickness of 100-600 nm.

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