Insert holder having transversely oriented insert receiving pocket with resilient upper jaw having outer flexibility groove and cutting tool

Patent metadata

Field	Value
Publication number	US-10953474-B2
Application number	US-201916357565-A
Country	US
Kind code	B2
Filing date	Mar 19, 2019
Priority date	Mar 19, 2019
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A cutting tool includes a cutting insert resiliently clamped in an insert holder. The insert holder has a holder longitudinal axis defining opposite forward to rearward directions, and a transversely oriented insert receiving pocket having a pocket longitudinal axis and a pocket front opening. The insert holder includes a forwardly located insert mounting portion that includes upper and lower jaws which together define the insert receiving pocket. The insert receiving pocket at the lower jaw includes a pocket lower clamping surface. The insert receiving pocket at the upper jaw includes a pocket upper clamping surface which faces mutually towards the pocket lower clamping surface. The insert receiving pocket at one of the upper and lower jaws includes a pocket stopper surface facing generally towards the pocket front opening. The upper jaw includes an outer flexibility groove recessed in the holder peripheral surface.

First claim

What is claimed is:

1. An elongated insert holder ( 24 ), having a holder longitudinal axis (B) defining opposite forward to rearward directions (DF, DR), the insert holder ( 24 ) comprising:
a holder peripheral surface ( 26 ) extending circumferentially about the holder longitudinal axis (B), the holder peripheral surface ( 26 ) intersecting, and forming a boundary of, a holder end surface ( 28 ) at a forward end of the insert holder ( 24 );
a shank portion ( 30 ) and an insert mounting portion ( 32 ) located at a forward end thereof, the insert mounting portion ( 32 ) comprising:
upper and lower jaws ( 34 , 36 ) which are spaced apart by a clamping recess ( 38 ), the clamping recess ( 38 ) being recessed in the holder end surface ( 28 ) and opening out to the holder peripheral surface ( 26 ) at first and second recess side openings ( 40 a , 40 b ), the upper jaw ( 34 ) being resiliently movable with respect to the lower jaw ( 36 ) by rotating around a pivot axis (P); and
a transversely oriented insert receiving pocket ( 46 ) configured to receive a cutting insert therein, the insert receiving pocket ( 46 ) being formed in the clamping recess ( 38 ) and defined, at least partially, by pocket upper and lower surfaces ( 48 , 50 ) formed on the upper and lower jaws ( 34 , 36 ), respectively, and extending longitudinally along a pocket longitudinal axis (L) to the first recess side opening ( 40 a ) to define a pocket front opening ( 52 a ); wherein:
a pocket longitudinal plane (LP) located between the pocket upper and lower surfaces ( 48 , 50 ) contains the pocket longitudinal axis (L);
the pocket lower surface ( 50 ) comprises a pocket lower clamping surface ( 54 );
the pocket upper surface ( 48 ) comprises a pocket upper clamping surface ( 60 ) which faces mutually towards the pocket lower clamping surface ( 54 );
the insert receiving pocket ( 46 ) comprises a pocket stopper surface ( 68 ) formed at one of the pocket upper and lower surfaces ( 48 , 50 ), facing generally towards the pocket front opening ( 52 a ); and
the upper jaw ( 34 ) comprises an outer flexibility groove ( 82 ) recessed in the holder peripheral surface ( 26 ), and is configured to resiliently clamp a cutting insert in the insert receiving pocket ( 46 ) without the use of an additional, separate clamping device.

2. The insert holder ( 24 ), according to claim 1 , wherein the pocket stopper surface ( 68 ) is formed at the pocket lower surface ( 50 ).

3. The insert holder ( 24 ), according to claim 1 , wherein:
the insert receiving pocket ( 46 ) is oriented along a transverse pocket plane (PP) which contains the pocket longitudinal axis (L), and which intersects the pocket upper and lower surfaces ( 48 , 50 ); and
the transverse pocket plane (PP) is transverse to the holder longitudinal axis (B).

4. The insert holder ( 24 ), according to claim 3 , wherein the transverse pocket plane (PP) is perpendicular to the holder longitudinal axis (B).

5. The insert holder ( 24 ), according to claim 1 , wherein the insert receiving pocket ( 46 ) opens out to the holder end surface ( 28 ).

6. The insert holder ( 24 ), according to claim 1 , comprising an upper support rib ( 59 ) which protrudes from the holder peripheral surface ( 26 ) and is located on the upper jaw ( 34 ) adjacent the pocket front opening ( 52 a ).

7. The insert holder ( 24 ), according to claim 1 , comprising a lower support rib ( 58 ) which protrudes from the holder peripheral surface ( 26 ) and is located on the lower jaw ( 36 ) adjacent the pocket front opening ( 52 a ).

8. The insert holder ( 24 ), according to claim 1 , comprising a resilience slot ( 70 ) formed in the clamping recess ( 38 ) and extending rearwardly from the insert receiving pocket ( 46 ).

9. The insert holder ( 24 ), according to claim 8 , wherein the resilient slot ( 70 ) comprises a forwardmost resilience slot portion ( 70 a ) which extends from the second recess side opening ( 40 b ) to the insert receiving pocket ( 46 ) along the holder end surface ( 28 ).

10. The insert holder ( 24 ), according to claim 9 , wherein the insert mounting portion ( 32 ) comprises a key slot ( 77 a ) formed in the clamping recess ( 38 ) which extends from the holder peripheral surface ( 26 ) to the insert receiving pocket ( 46 ) along the holder end surface ( 28 ) so that the key slot ( 77 a ) and the forwardmost resilience slot portion ( 70 a ) form a forwardly projecting stopper projection ( 77 b ) upon which the pocket stopper surface ( 68 ) is located.

11. The insert holder ( 24 ), according to claim 8 , wherein:
the resilience slot ( 70 ) comprises a slot stress relief groove ( 76 ) at which it terminates in the rearward direction (DR); and
the slot stress relief groove ( 76 ) extends along the pivot axis (P).

12. The insert holder ( 24 ), according to claim 1 , wherein:
the clamping recess ( 38 ) is defined by opposite recess upper and lower surfaces ( 42 , 44 ) formed on the upper and lower jaws, respectively ( 34 , 36 ); and
the upper jaw ( 34 ) comprises an inner flexibility groove ( 78 ) recessed in the recess upper surface ( 42 ).

13. The insert holder ( 24 ), according to claim 12 , wherein the inner flexibility groove ( 78 ) opens out to the holder end surface ( 28 ) at an inner flexibility groove opening ( 80 ) and extends to beyond the insert receiving pocket ( 46 ) in the rearward direction (DR) of the insert holder ( 24 ).

14. The insert holder ( 24 ), according to claim 1 , wherein the outer flexibility groove ( 82 ) extends to beyond the insert receiving pocket ( 46 ) in the rearward direction (DR) of the insert holder ( 24 ).

15. The insert holder ( 24 ), according to claim 1 , wherein:
the insert receiving pocket ( 46 ) is oriented along a transverse pocket plane (PP);
the pocket longitudinal plane (LP) is perpendicular to the transverse pocket plane (PP); and
the holder peripheral surface ( 26 ) comprises a peripheral recessed surface ( 83 ) extending from the outer flexibility groove ( 82 ) to the holder end surface ( 28 ), the peripheral recessed surface ( 83 ) sloping towards the pocket longitudinal plane (LP) in the forward direction (DF).

16. The insert holder ( 24 ), according to claim 15 , wherein the peripheral recessed surface ( 83 ) is planar.

17. The insert holder ( 24 ), according to claim 1 , wherein the pivot axis (P) is non-perpendicular to the holder longitudinal axis (B).

18. The insert holder ( 24 ), according to claim 1 , wherein the outer flexibility groove ( 82 ) is oriented transversely to the holder longitudinal axis (B).

19. The insert holder ( 24 ), according to claim 18 , wherein:
the outer flexibility groove ( 82 ) comprises opposite first and second outer flexibility groove ends ( 84 a , 84 b ) formed at opposite longitudinal extremities thereof, the first outer flexibility groove end ( 84 a ) being adjacent the first recess side opening ( 40 a ) and the second outer flexibility groove end ( 84 b ) being adjacent the second recess side opening ( 40 b ).

20. The insert holder ( 24 ), according to claim 19 , wherein:
the first outer flexibility groove end ( 84 a ) is further from the holder end surface ( 28 ) than the second outer flexibility groove end ( 84 b ).

21. The insert holder ( 24 ), according to claim 19 , wherein:
the outer flexibility groove ( 82 ) comprises two opposite first and second lateral groove surfaces ( 85 a , 85 b ) extending between the first and second outer flexibili

Assignees

• Iscar Ltd

Inventors

• Hecht Gil
• Harouche David Ben

Classifications

• B23B2260/0785

  for unclamping cutting inserts · CPC title

• B23B2231/0264

  Axial grooves · CPC title

• B23B2220/123

  Producing internal grooves · CPC title

• B23B2205/125

  One or more walls of the seat being elastically deformable · CPC title

• B23B2205/12

  Seats for cutting inserts · CPC title