Sandvik Coromant Patente

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A cutting tool (1) for metal cutting, comprising a tool body (2), wherein the tool body (2) comprises an insert seat (11), wherein a recess (9) is formed in the tool body (2), wherein tool body (2) comprises vibration damping means (4), wherein the vibration damping means (4) comprises a cantilever member (12), wherein the cantilever member (12) is adjacent to the recess (9), wherein the cantilever member (12) comprises a cantilever beam (5) and an end mass (8), wherein the cantilever member (12) extends between a fixed end (6) and a free end (7), wherein the fixed end (6) is permanently connected to the tool body (2), wherein the cantilever beam (5) extends from the fixed end (6), and wherein the end mass (8) extends from the free end (7).

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A clamping device for releasably holding a tool holder shank (81), comprising: - a spindle (2) rotatably mounted inside a housing (3); - a drawbar (8) axially moveable in a bore (5) in the housing between an advanced releasing position and a retracted locking position; - engagement members (20) moveable under the effect of the drawbar into locking engagement with the tool holder shank; - an actuating member (13) slidably mounted to the spindle; - a motion transferring mechanism (30) for transferring an axial movement of the actuating member into a movement of the drawbar; and - a cylinder housing (60) and an associated piston member (70) for moving the actuating member in relation to the spindle. The cylinder housing (60) is arranged in the housing (3) in an axially floating manner. The actuating member (13) is rotatable in relation to the cylinder housing (60) and the piston member (70) together with the spindle (2).

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A metal cutting drill insert (100) for a drill tool (500), comprising: opposing top surface (101) and bottom surface (102) with a symmetry axis of the cutting drill insert extending there between, and a peripheral side surface (103) extends between said top surface and said bottom surface, wherein the top surface comprises a rake face (104) and the side surface (103) comprises a clearance face (105); at least one cutting edge (106) is formed at an intersection of the rake face (104) of the top surface (101) and an adjoining clearance face (105) of the side surface (103), at least one chip breaker (107) is formed in the rake face (104) adjacent to and along the cutting edge (106); characterized in that the at least one chip breaker (107) comprises: a first chip groove (108) with a constant width (w1) and constant depth (d1) relative the cutting edge (106); a second chip groove (110) with an increasing width, and a constant depth (d2) relative the cutting edge (106), and a transitional chip groove (109) which connects the first chip groove (108) to the second chip groove (110).

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A round cutting insert (1) for a milling tool having an insert centre axis (C₁) and a neutral plane (NP) extending perpendicularly to the insert centre axis (C₁). The round cutting insert includes a circumferential side surface (4) surrounding the insert centre axis (C₁) and extending between upper and lower round main surfaces (2, 3), wherein an upper cutting edge (6) is formed along the intersection of the upper round main surface (2) and the circumferential side surface (4), and a plurality of elongated support grooves (7) are arranged in the circumferential side surface (4). Each elongated support groove (7) has a bottom surface (8) extending in a lengthwise direction (L) with opposite flank surfaces (9a, 9b) converging toward the bottom surface (8) and extending in parallel with the lengthwise direction (L) of the elongated support groove (7). The lengthwise direction (L) of each elongated support groove (7) is forming an acute angle θ with the neutral plane (NP) as seen in a side view of the round cutting insert (1), and at least one of the opposite flank surfaces (9a, 9b) of each elongated support groove (7) is configured as a side support surface (9a) for the round cutting insert.

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The invention relates to a milling tool (1) having a front end (2), a rear end (3), and a longitudinal axis (C) extending therebetween, wherein the milling tool comprises a shank portion (4) and a cutting portion (5). The cutting portion extends along the longitudinal axis from the front end towards the shank portion, and comprises a plurality of teeth (6) separated from each other by a corresponding number of flutes (7), wherein the teeth (6) extend axially along the cutting portion (5) following a curved helical path around the longitudinal axis. Each tooth (6) extends at a first helix angle (α) from the front end (2) to a helix transition (8), and at a second helix angle (β) from the helix transition towards the shank portion. The second helix angle (β) is greater than the first helix angle (α) by at least 2° and at most 15°. The first helix angle (α) fulfills 33° ≤ α ≤ 50°, whereas the second helix angle (β) fulfills 40° ≤ β ≤ 55°, and the helix transition (8) is axially located within a distance, from the front end (2), of 0.2 to 0.7 of the longitudinal length of the cutting portion (5).

The invention relates to a method of making a tool comprising a joining a maraging steel joining partner and a cemented carbide joining partner by brazing. The present invention also relates to a tool made according to this method. The method comprising depositing a Ni coating onto the maraging steel part prior to applying the filler material comprising at least 70wt% Cu. The braze joint shows excellent shear strength.

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The invention relates to a clamping device (1) for releasably holding a tool holder shank (33). The device comprises a housing (2), a drawbar (6) being mounted reciprocally movable inside a bore (5) in the housing, and an actuator (8). An aperture extends along an actuator axis (A) and is delimited by an aperture housing surface (24) and a drawbar groove (25). A first locking pressure applying surface (10) on the actuator acts upon a first locking pressure receiving surface (11) in the drawbar groove to effectuate a displacement of the drawbar (6) when the actuator (8) is moved along the actuator axis (A) in a first direction (D), resulting in clamping of the tool holder shank (33).