Cutting tool assembly
AssigneeIscar, Ltd.
InventorGil Hecht
Life of this patent
Estimating the term…
Abstract
A cutting tool assembly having a cutting insert with a generally cylindrical portion and an axially extending radial projection. The cutting insert is located in an insert retaining portion with the axially extending radial projection protruding from an axially extending aperture. The cutting insert is clamped in position by means of a resilient radial force exerted by a resilient clamping jaw on the generally cylindrical portion of the cutting insert.
Claims40
A cutting tool assembly (10) comprising a cutting insert holder (12) and a cutting insert (14), the cutting insert holder comprising a body portion (16) and an insert retaining portion (18) the insert retaining portion having a generally cylindrical inner surface (32) of diameter D1 and a longitudinal axis A;
- the insert retaining portion (18) comprising a fixed portion (22) connected to the body portion (16) and an axially extending clamping jaw (24) having a radially facing clamping surface (42), the axially extending clamping jaw (24) being connected to the fixed portion (22) on one side along an axially extending juncture (25) and separated from the fixed portion (22) on an other side along an axially extending free end (30) by an axially extending aperture (27), the axially extending aperture (27) being bound by the free end (30) of the clamping jaw (24) on one side and by an axially extending first locating surface (36) of the fixed portion (22), adjacent the inner surface (32), on an opposite side;
- the cutting insert (14) comprising a generally cylindrical portion (44) having a longitudinal axis B and an axially extending radial projection (46) connected thereto, the radial projection having upper and lower surfaces (55, 62) connected to the cylindrical portion (44) and being separated by a side surface (57), the upper surface (55) and the side surface (57) meeting at an edge, at least a portion of which constitutes a cutting edge (56), and the lower surface (62) constitutes a first locating surface;
- and
- the cutting insert (14) being located in the insert retaining portion (18) with the axially extending radial projection (46) protruding from the axially extending aperture (27) and the first locating surface (62) of the cutting insert abutting the first locating surface (36) of the insert retaining portion (18),
- characterized in that the clamping jaw (24) being separated from the body portion (16) by a slot (26), being resiliently displaceable relative to the fixed portion (22) and the cutting insert (14) being clamped in position by means of a resilient radial force exerted by the clamping surface (42) of the clamping jaw (24) on the generally cylindrical portion (44) of the cutting insert (14).
A cutting insert (14) comprising a generally cylindrical portion (44) having a longitudinal axis B and an axially extending radial projection (46) connected thereto, the radial projection having upper and lower surfaces (55, 62) connected to the cylindrical portion and being separated by a side surface (57), the upper surface (55) and the side surface (57) meeting at an edge, at least a portion of which constitutes a cutting edge (56) and the lower surface (62) constitutes a first locating surface, the generally cylindrical portion is provided with three axially extending ribs, two of the three axially extending ribs (50, 52) have radially outermost regions that lie on a cylindrical envelope of diameter D2 having as axis the longitudinal axis B,
- characterized in that one of the three axially extending ribs (54) has a radially outermost region that lies on a cylindrical envelope of diameter D3 and wherein the diameter D3 is greater than the diameter D2.
A cutting tool assembly (10) comprising a cutting insert holder (12) and a cutting insert (14), the cutting insert holder comprising a body portion (16) and an insert retaining portion (18) the insert retaining portion having a generally cylindrical inner surface (32) of diameter D1 and a longitudinal axis A;
- the insert retaining portion (18) comprising a fixed portion (22) connected to the body portion (16) and an axially extending clamping jaw (24) having a radially facing clamping surface (42), the axially extending clamping jaw (24) being connected to the fixed portion (22) on one side along an axially extending juncture (25) and separated from the fixed portion (22) on an other side along an axially extending free end (30) by an axially extending aperture (27), the axially extending aperture (27) being bound by the free end (30) of the clamping jaw (24) on one side and by an axially extending first locating surface (36) of the fixed portion (22), adjacent the inner surface (32), on an opposite side;
- the cutting insert (14) comprising a generally cylindrical portion (44) having a longitudinal axis B and an axially extending radial projection (46) connected thereto, the radial projection having upper and lower surfaces (55, 62) connected to the cylindrical portion (44) and being separated by a side surface (57), the upper surface (55) and the side surface (57) meeting at an edge, at least a portion of which constitutes a cutting edge (56), and the lower surface (62) constitutes a first locating surface;
- and
- the cutting insert (14) being located in the insert retaining portion (18) with the axially extending radial projection (46) protruding from the axially extending aperture (27) and the first locating surface (62) of the cutting insert abutting the first locating surface (36) of the insert retaining portion (18),
- characterized in that the clamping jaw (24) being separated from the body portion (16) by a slot (26), being resiliently displaceable relative to the fixed portion (22) and the cutting insert (14) being clamped in position by means of a resilient radial force exerted by the clamping surface (42) of the clamping jaw (24) on the generally cylindrical portion (44) of the cutting insert (14), and
- wherein in a first clamping position the clamping surface (42) of the clamping jaw (24) lies on a cylindrical envelope having a second diameter (D2), wherein in a second clamping position the clamping surface (42) of the clamping jaw (24) lies on a cylindrical envelope having a third diameter (D3) and wherein the third diameter being larger than the second diameter.
Dependencies are inferred from the claim text.