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US 8,708,610 B2Granted
Cutting body and cutting insert having a stopping recess for a rotary cutting tool
AssigneeIscar, Ltd.
InventorGil Hecht
Life of this patent
Estimating the term…
Abstract
A rotary cutting tool has a disc-shaped tool body and a cutting insert. The cutting insert is resiliently retained by jaws having tangentially-oriented abutment surfaces and defining, together with a holding member, an insert pocket of the tool body. The holding member is configured to bend in a radially-outward direction during rotation of the tool body about the rotation axis, and to engage a stopping recess of the cutting insert to oppose dislodgement of the cutting insert from the tool body.
Claims22
A cutting insert (14) comprising:
- opposing insert side surfaces (18);
- opposing insert upper and lower surfaces (20, 22) extending between the insert side surfaces (18), at least a portion of the insert upper surface (20) constituting a rake surface (40);
- opposing insert front and rear surfaces (24, 26) extending between the insert side surfaces (18) and the insert upper and lower surfaces (20, 22), at least a portion of the insert front surface (24) constituting a relief surface (38);
- a cutting edge (44) formed at an intersection of the rake and relief surfaces (40, 38);
- a stopping recess (28) located between the insert upper and lower surfaces (20, 22) and having an asymmetric shape;
- and
- an interposing first portion (30A) located adjacent the stopping recess (28) and between the stopping recess (28) and the insert lower surface (22), wherein:
- the insert front surface (24) comprises:
- a front first sub-surface (24A) extending from the insert upper surface (20), and
- a front second sub-surface (24B) which is recessed relative to the front first sub-surface 24A);
- the insert lower surface (22) comprises:
- a lower first sub-surface (22A) extending between the insert rear surface (26) and the front second sub-surface (24B), and
- a lower second sub-surface (22B) extending between the front first sub-surface (24A) and the front second sub-surface (24B);
- the insert rear surface (26) comprises:
- a rear first sub-surface (26A) extending from the insert upper surface (20), and
- a rear second sub-surface (26B) extending from the lower first sub-surface (22A) and following a straight line in a plan view of one of the insert side surfaces (18);
- wherein the stopping recess (28) is located between the rear first and second sub-surfaces (26A, 26B).
14 more elements
A cutting insert (14) comprising:
- opposing insert side surfaces (18);
- opposing insert upper and lower surfaces (20, 22) extending between the insert side surfaces (18), at least a portion of the insert upper surface (20) constituting a rake surface (40);
- opposing insert front and rear surfaces (24, 26) extending between the insert side surfaces (18) and the insert upper and lower surfaces (20, 22), at least a portion of the insert front surface (24) constituting a relief surface (38);
- a cutting edge (44) formed at an intersection of the rake and relief surfaces (40, 38);
- a stopping recess (28) located between the insert upper and lower surfaces (20, 22) and having an asymmetric shape;
- and
- an interposing first portion (30A) located adjacent the stopping recess (28) and between the stopping recess (28) and the insert lower surface (22),
- wherein the stopping recess (28) further comprises
- a recess stopping surface (34) extending into the cutting insert (14) from the rear surface (26), and
- a recess relief surface (32);
- wherein, in a plan view of one of the insert side surfaces (18) and/or a corresponding cross-sectional view,
- the recess relief surface (32) has a recess relief surface magnitude L1, and
- the recess stopping surface (34) has a recess stopping surface magnitude L2 which is smaller than the recess relief surface magnitude L1.
10 more elements
The cutting insert (14) according to 7, wherein the stopping recess' (28) asymmetric shape is in a plan view of one of the insert side surfaces (18) and/or a corresponding cross-sectional view.
A tool body (12) being disc-shaped, configured to rotate about a rotation axis (AR) and comprising
- a base jaw (58),
- a clamping jaw (60) resiliently connected to the base jaw (58),
- a holding member (62), and
- at least one peripherally located insert pocket (16) defined by the base jaw (58), the clamping jaw (60) and the holding member (62) and defining insert insertion and removal directions (DII, DIR) extending along a gap (63) located between the base jaw (58) and the clamping jaw (60);
- the base jaw (58) comprising a base jaw abutment surface (68) extending parallel to the insert insertion and removal directions (DII, DIR);
- the clamping jaw (60) extending from the base jaw (58) and comprising a clamping jaw abutment surface (74) facing at least a portion of the base jaw abutment surface (68) and extending along the insert insertion and removal directions (DII, DIR), and
- further comprising a clamping jaw insert stop surface (76) extending in a transverse direction (DIT) which is transversely oriented to the insert insertion and removal directions (DII, DIR);
- and
- the holding member (62) being configured to resiliently bend in the transverse direction (DIT), relative to at least a portion of the base jaw (58), wherein
- the insert insertion and removal directions (DII, DIR) extend parallel to a tangential direction (DT), relative to the disc-shape, of the tool body (12) and said transverse direction (DIT) extends parallel to a radial direction (Dx), relative to the disc-shape, of the tool body (12).
7 more elements
Dependencies are inferred from the claim text.