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公开(公告)号：EP4094868A1
公开(公告)日：2022-11-30
申请号：EP21175886.7
申请日：2021-05-26
申请人： AB Sandvik Coromant
发明人： BERGMAN, Stefan , LARSSON, Olof
摘要： The invention relates to a tool body (1) for a milling tool. The tool body includes a front end (5), a rear end (6), an envelope surface (7) extending between the front end (5) and the rear end (6), a central recess (8) extending from the rear end (6) and configured to receive coolant from a spindle of a machine, at least one insert seat (3) in which a cutting insert (2) can be securely mounted formed in a transition between the front end (5) and the envelope surface (7), and at least one coolant passageway for passage of coolant from the central recess (8) to the exterior of the tool body (1). The coolant passageway comprises a first portion (9) extending from the central recess (8) in an outward direction towards the envelope surface (7), and a second portion extending from the first portion (9) to an outlet (11) in the exterior of the tool body (1), wherein the outlet (11) is located in the insert seat (3) and/or in the envelope surface (7) behind the insert seat with respect to a rotation direction of the tool body (1). The second portion of the coolant passageway is directed towards the insert seat (3) such that, when a cutting insert (2) comprising a cutting edge (24) and a flank face is mounted in the insert seat (3) such that the flank face faces outward with respect to the tool body, coolant emerging from the outlet (11) will pass along the flank face towards the cutting edge (24). The second portion of the coolant passageway is a channel (10) having a length that is greater than a width thereof.
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公开(公告)号：EP4052824A1
公开(公告)日：2022-09-07
申请号：EP21160195.0
申请日：2021-03-02
申请人： AB Sandvik Coromant
发明人： BERGMAN, Stefan , ROMAN, Stefan
摘要： A metal cutting milling tool 100, comprising: a body that is rotatable around a central axis C in a rotational direction; wherein the body comprises: a front end 106, a plurality of land portions 156 extending axially rearwards from the front end 106, a plurality of chip rooms 146 extending axially rearwards from the front end,
wherein each land portion 156 of the plurality of land portions is delimited by a leading 157 and a trailing surface 158 in the rotational direction, wherein the leading surface 157 is rotationally ahead of the trailing surface 158 and wherein each land portion 156, as part of the leading surface 157 in a radially outer and forward region, comprises an insert seat 110 for receiving a cutting insert 114; each chip room 146 of the plurality of chip rooms is positioned between two adjacent land portions 156 of the plurality of land portions, wherein each chip room 146 is delimited by a chip room surface comprising the trailing surface 157 of first land portion 156, the leading surface 157 of a second land portion 156 and a bottom surface positioned between the trailing surface 158 and the leading surface 157, wherein the first land portion 156 is rotationally ahead of the second land portion 156, wherein as seen in a cross section perpendicular to the central axis C each chip room surface has a curvature with a smallest radius r, characterized in that the smallest radius r2 in a second cross section and the smallest radius r3 in a third cross section are larger than the smallest radius r1 in a first cross section, wherein the first cross section is axially forward of the second cross section and the third cross section.-
公开(公告)号：EP4052823A1
公开(公告)日：2022-09-07
申请号：EP21160194.3
申请日：2021-03-02
申请人： AB Sandvik Coromant
发明人： BERGMAN, Stefan , ROMAN, Stefan
摘要： A metal cutting milling tool 100, comprising: a body that is rotatable around a central axis C in a rotational direction; wherein the body comprises: a front end 106, a plurality of land portions 156 extending axially rearwards from the front end 106, a plurality of chip rooms 146 extending axially rearwards from the front end,
wherein each chip room 146 of the plurality of chip rooms is positioned between two adjacent land portions 156 of the plurality of land portions; each land portion 156 of the plurality of land portions is delimited by a leading 157 and a trailing surface 158 as seen in the rotational direction, wherein the leading surface 157 is rotationally ahead of the trailing surface 158, and wherein each land portion 156 as part of the leading surface 157 in a radially outer and forward region, comprises an insert seat 110 for receiving a cutting insert 114; at the front end 106 of the milling tool 100, in a plane perpendicular to the central axis C, an angle between a radius intersecting a radially outer point in the insert seat 110 of a first land portion 156 and a radius intersecting a corresponding point in the insert seat 110 of a second land portion 156 defines a seat pitch angle α for the first land portion 156, and wherein the first land portion and a second land portion 156 are adjacent consecutive land portions in the rotational direction, at least three different land portions 156 of the plurality of land portions have seat pitch angles α that differ in value, and wherein at the front end of the milling tool, each land portion 156 has a respective arc length AL defined by the circumferential distance along the radial periphery of the milling tool 100 between the insert seat 110 and the trailing surface 158 for respective land portion 156, characterized in that the longest arc length AL is at most 10 % longer than the shortest arc length AL.
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