Tool body having an inner insert receiving pocket with resilient clamping member, cutting tool and chamfering cutting insert therefor

Patent metadata

Field	Value
Publication number	US-10493539-B2
Application number	US-201715434384-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 16, 2017
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A cutting tool includes a tool body having a peripherally disposed outer insert receiving pocket and an interiorly disposed inner insert receiving pocket with a cutting insert resiliently clamped therein. The tool body includes a through recess at least partially circumferentially bounded by a recess circumferential surface. A resilient clamping member extends into the through recess. The inner insert receiving pocket is formed by the resilient clamping member and a recess pocket portion of the recess circumferential surface. A chamfering cutting insert may be retained by the resilient clamping member, without the use of an additional, separate clamping device.

First claim

What is claimed is:

1. A tool body ( 24 ) comprising:
two opposing body side surfaces ( 26 ) and a body peripheral surface ( 28 ) extending therebetween;
a body central axis (B) intersecting the two body side surfaces ( 26 );
a peripherally disposed outer insert receiving pocket ( 58 ); and
an interiorly disposed inner insert receiving pocket ( 46 ) comprising a resilient clamping member ( 36 ) configured to resiliently retain a chamfering cutting insert ( 22 ) therein without the use of an additional, separate clamping device; wherein:
the peripherally disposed outer insert receiving pocket ( 58 ) and the interiorly disposed inner insert receiving pocket ( 46 ) are integrally formed together to have unitary, one-piece construction; and
on both sides of the tool body ( 24 ), the inner insert receiving pocket is closer to the body central axis (B) than the peripherally disposed outer insert receiving pocket ( 58 ).

2. The tool body ( 24 ), according to claim 1 , wherein the resilient clamping member ( 36 ) is disposed between the inner insert receiving pocket ( 46 ) and a resilience slit ( 42 ).

3. The tool body ( 24 ), according to claim 1 , wherein the resilient clamping member ( 36 ) is a cantilever having a clamping member fixed end ( 38 ) and a clamping member free end ( 40 ).

4. The tool body ( 24 ), according to claim 1 , wherein:
the inner insert receiving pocket ( 46 ) extends along a pocket longitudinal axis (P) which passes through a pocket opening end ( 48 ) and a pocket distal end ( 50 ), the pocket opening end ( 48 ) being located closer to the body peripheral surface ( 28 ) than the pocket distal end ( 50 );
the inner insert receiving pocket ( 46 ) transitions into an insert insertion clearance region ( 56 ) at the pocket opening end ( 48 ); and
the insert insertion clearance region ( 56 ) has a larger dimension, as measured in a direction perpendicular to the pocket longitudinal axis (P), than the inner insert receiving pocket ( 46 ).

5. The tool body ( 24 ), according to claim 1 , wherein:
the tool body comprises a through recess ( 30 ) opening out to the two body side surfaces ( 26 ), and at least partially circumferentially bounded by a recess circumferential surface ( 32 );
the resilient clamping member ( 36 ) extends into the through recess ( 30 ); and
the interiorly disposed inner insert receiving pocket ( 46 ) is formed by the resilient clamping member ( 36 ) and a recess pocket portion ( 34 ) of the recess circumferential surface ( 32 ).

6. The tool body ( 24 ), according to claim 5 , wherein the resilient clamping member ( 36 ) is connected to the recess circumferential surface ( 32 ).

7. The tool body ( 24 ), according to claim 5 , wherein the through recess ( 30 ) is spaced apart from the body peripheral surface ( 28 ).

8. The tool body ( 24 ), according to claim 5 , wherein the through recess ( 30 ) opens out to the body peripheral surface ( 28 ).

9. The tool body ( 24 ), according to claim 5 , wherein:
the two body side surfaces ( 26 ) are planar and perpendicular to the body central axis (B).

10. The tool body ( 24 ), according to claim 1 , wherein:
the tool body ( 24 ) is disc-like and rotatable about the body central axis (B) in a rotational direction (R); and
the inner insert receiving pocket ( 46 ) is closer to the body central axis (B) than is the outer insert receiving pocket ( 58 ).

11. The tool body ( 24 ), according to claim 1 , wherein:
the tool body ( 24 ) is a cutting blade which is mirror symmetric about a transverse plane (PT) containing the body central axis (B); and
the inner insert receiving pocket ( 46 ) is closer to both the transverse plane (PT) and body central axis (B), than is the outer insert receiving pocket ( 58 ).

12. The tool body ( 24 ), according to claim 1 , wherein the peripherally disposed outer insert receiving pocket ( 58 ) and the interiorly disposed inner insert receiving pocket ( 46 ) are configured to receive cutting inserts which differ from one another in shape.

13. A cutting tool ( 20 ) comprising:
a tool body ( 24 ) in accordance with claim 1 ; and
a cutting insert ( 22 ) resiliently clamped in the inner insert receiving pocket ( 46 ) by the resilient clamping member ( 36 ).

14. The cutting tool ( 20 ) according to claim 13 , wherein:
the resilient clamping member ( 36 ) comprises a clamping abutment surface ( 44 );
the recess pocket portion ( 34 ) comprises a pocket abutment surface ( 52 ) located opposite the clamping abutment surface ( 44 );
the cutting insert ( 22 ) has an insert peripheral surface ( 64 );
the insert peripheral surface ( 64 ) comprises an insert top surface ( 70 ) and an insert bottom surface ( 72 ) opposite the insert top surface ( 70 );
the insert top surface ( 70 ) comprises an insert top abutment surface ( 86 );
the insert bottom surface ( 72 ) comprises an insert bottom abutment surface ( 76 );
the insert bottom abutment surface ( 76 ) abuts the pocket abutment surface ( 52 ); and
the clamping abutment surface ( 44 ) resiliently engages the insert top abutment surface ( 86 ).

15. The cutting tool ( 20 ) according to claim 14 , wherein the insert top non-abutment surface ( 88 ) is spaced apart from the resilient clamping member ( 36 ).

16. The cutting tool ( 20 ) according to claim 13 , wherein the cutting insert is a non-indexable chamfering cutting insert ( 22 ), having an insert longitudinal axis (I) defining a forward to rearward direction (D F , D R ), the cutting insert ( 22 ) comprising:
opposing insert front and rear end surfaces ( 60 , 62 ) and an insert peripheral surface ( 64 ) extending therebetween, the insert peripheral surface ( 64 ) comprising an insert top surface ( 70 );
a vertical plane (PV) containing the insert longitudinal axis (I) and passing through the insert top surface ( 70 );
a non-cutting edge ( 100 ) formed by the intersection of the insert front end surface ( 60 ) and the insert top surface ( 70 ); and
at least one laterally protruding chamfering portion ( 90 ) comprising a chamfering cutting edge ( 98 ); wherein:
each chamfering portion ( 90 ) is located at a forward end ( 66 ) of the cutting insert ( 22 );
in a top view of the insert, the non-cutting edge ( 100 ) extends on both sides of the vertical plane (PV) containing the insert longitudinal axis (I); and
in said top view of the insert, the insert's total length (TL) taken along the insert longitudinal axis (I) is larger than the insert's total width (TW) taken perpendicular to the vertical plane (PV).

17. The cutting tool ( 20 ) according to claim 13 , wherein the cutting insert is a non-indexable chamfering cutting insert ( 22 ), having an insert longitudinal axis (I) defining a forward to rearward direction (D F , D R ), the cutting insert ( 22 ) comprising:
opposing insert front and rear end surfaces ( 60 , 62 ) and an insert peripheral surface ( 64 ) extending therebetween, the insert peripheral surface ( 64 ) comprising an insert top surface ( 70 );
a non-cutting edge ( 100 ) formed by the intersection of the insert front end surface ( 60 ) and the insert top surface ( 70 ); and
at least one laterally protruding chamfering portion ( 90 ) comprising a chamfering cutting edge ( 98 );
wherein:
in a top view of the insert, the non-cutting edge ( 100 ) extends on both sides of a vertical plane (PV) containing the insert longitudinal axis (I) and passing through the insert top surface ( 70 ); and
the insert top surface ( 70 ) comprises an insert top raised portion ( 80 ) comprising an insert top abutment surface ( 86 ) and an insert to

Assignees

• Iscar Ltd

Inventors

• Athad Shimon

Classifications

• B23C2210/285

  Cutting edges arranged at different diameters · CPC title

• B23C3/28

  Grooving workpieces (tread-cutting by milling B23G1/32) · CPC title

• B23C3/12

  Trimming or finishing edges, e.g. deburring welded corners · CPC title

• B23B2220/28

  Parting off and chamferring simultaneously · CPC title

• B23B2220/04

  Chamferring (B23B2220/28 takes precedence) · CPC title