Tool holding system having captive and non-releasable members, method of manufacture and assembly of same and cutting tool

Patent metadata

Field	Value
Publication number	US-10668541-B2
Application number	US-201715664537-A
Country	US
Kind code	B2
Filing date	Jul 31, 2017
Priority date	Jul 31, 2017
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A cutting tool includes a tool holding system having a clamping portion. The clamping portion includes an integrally formed one-piece inner coupling member that at least partially forms a clamping sleeve portion having a clamping bore for clampingly receiving a cutting insert. The clamping portion also includes an integrally formed one-piece outer coupling member that is circumferentially disposed about at least a portion of the inner coupling member. The tool holding system also has a mounting portion that is connected to one of the inner and outer coupling members. The inner and outer coupling members are captively and non-releasably engaged with each other via inter-engaged first and second engagement surfaces that are slidingly displaceable with respect to each other.

First claim

What is claimed is:

1. A tool holding system ( 22 , 122 ), having a tool holding system central axis (A) defining opposite forward and rear directions (DF, DR), the tool holding system ( 22 , 122 ) comprising:
a clamping portion ( 28 ) comprising:
an integrally formed one-piece inner coupling member ( 36 , 136 ) forming at least part of a clamping sleeve portion ( 30 ) having a clamping bore ( 32 ), for clampingly receiving a cutting insert ( 24 ), the clamping bore ( 32 ) opening out at a forward end ( 34 ) of the tool holding system ( 22 , 122 ), the inner coupling member ( 36 , 136 ) having a radially outwardly facing a first engagement surface ( 56 ); and
an integrally formed one-piece outer coupling member ( 38 , 138 ) having a radially inwardly facing second engagement surface ( 58 ); and

a mounting portion ( 26 ) connected to one of the inner and outer coupling members ( 36 , 136 ; 38 , 138 ); wherein
the outer coupling member ( 38 , 138 ) is circumferentially disposed about at least a portion of the inner coupling member ( 36 , 136 ), with the first engagement surface ( 56 ) facing the second engagement surface ( 58 );
the inner and outer coupling members ( 36 , 136 ; 38 , 138 ) are permanently connected to one another, and are captively and non-releasably engaged with each other via inter-engaged first and second engagement surfaces ( 56 , 58 );
the first and second engagement surfaces ( 56 , 58 ) are slidingly displaceable with respect to each other to adjust the inner and outer coupling members between locked and released positions.

2. The tool holding system ( 22 , 122 ), according to claim 1 , wherein:
the first and second engagement surfaces ( 56 , 58 ) extend circumferentially about the too holding system central axis (A); and
the first and second engagement surfaces ( 56 , 58 ) are slidingly displaceable with respect to each other in a circumferential direction (S) about the tool holding system central axis (A).

3. The tool holding system ( 22 ), according to claim 2 , wherein:
the first and second engagement surfaces ( 56 , 58 ) are slidingly displaceable with respect to each other in the circumferential direction (S) by no more than 50°.

4. The tool holding system ( 22 ), according to claim 1 ; wherein:
the first engagement surface ( 56 ) comprises at least one engagement recess ( 62 ) recessed therein;
the second engagement surface ( 58 ) comprises at least one engagement projection ( 60 ) projecting therefrom; and
each engagement projection ( 60 ) is located in a respective engagement recess ( 62 ).

5. The tool holding system ( 22 ), according to claim 4 , wherein:
the at least one engagement projection ( 60 ) comprises a plurality of angularly spaced apart engagement projections ( 60 ) arranged in at least one axial projection row; and
the at least one engagement recess ( 62 ) comprises a plurality of angularly spaced apart engagement recesses ( 62 ) arranged in at least one axial recess row.

6. The tool holding system ( 22 ), according to claim 4 , wherein:
each engagement recess ( 62 ) comprises a central recess bottom surface ( 66 );
each recess bottom surface ( 66 ) comprises a recess clearance surface ( 68 ) and a recess abutment surface ( 70 ) adjacent thereto in the circumferential direction (S); and
the recess abutment surface ( 70 ) is located further from the tool holding system central axis (A) than the recess clearance surface ( 68 ) in the radial direction.

7. The tool holding system according to claim 6 , wherein:
each engagement projection ( 60 ) comprises a central projection top surface ( 74 );
each projection top surface ( 74 ) has a constant radial distance (D) from the tool holding system central axis (A).

8. The tool holding system ( 122 ), according to claim 1 , wherein:
the first engagement surface ( 56 ) comprises at least one engagement projection ( 60 ) projecting therefrom;
the second engagement surface ( 58 ) comprises at least one engagement recess ( 62 ) recessed therein; and
each engagement projection ( 60 ) is located in a respective engagement recess ( 62 ).

9. The tool holding system ( 122 ), according to claim 8 , wherein:
the at least one engagement recess ( 62 ) comprises an annular groove ( 108 ); and
the at least one engagement projection ( 60 ) comprises an annular ridge ( 110 ).

10. The tool holding system ( 22 ), according to claim 1 , wherein the outer coupling member ( 38 ) forms a tightening nut ( 54 ).

11. The tool holding system ( 22 ), according to claim 1 , wherein the inner coupling member ( 36 , 136 ) is integrally connected with the mounting portion ( 26 ) forming a tool body ( 39 ) having a one-piece construction.

12. The tool holding system ( 122 ), according to claim 1 , wherein:
the outer coupling member ( 138 ) comprises a radially inwardly facing outer threaded portion ( 98 );
the mounting portion ( 26 ) comprises a radially outwardly facing mounting threaded portion ( 100 ); and
the outer threaded portion ( 98 ) is threadingly engaged to the mounting threaded portion ( 100 ).

13. The tool holding system according to claim 1 , wherein the inner coupling member ( 36 ) forms in entirety the clamping sleeve portion ( 30 ).

14. The tool holding system ( 122 ), according to claim 1 , wherein:
the inner coupling member ( 136 ) forms a sliding collet ring ( 102 );
the clamping sleeve portion ( 30 ) further comprises a collet ( 106 ) that is releasable, attached to the inner coupling member ( 136 ); and
the clamping bore ( 32 ) is located in the collet ( 106 ).

15. The tool holding system ( 22 , 122 ), according to claim 1 , further comprising at least one coolant channel ( 76 ) opening out at the forward end ( 34 ) of the tool holding system ( 22 , 122 ).

16. The tool holding system ( 22 ), according to claim 15 , wherein each coolant channel ( 76 ) is formed in the inner coupling member ( 36 ) and extends an entire axial length thereof.

17. The tool holding system ( 22 ), according to claim 16 , wherein:
the inner coupling member ( 36 ) comprises at least one axially extending coolant ridge ( 78 ); and
each coolant channel ( 76 ) is located in a coolant ridge ( 78 ).

18. The tool holding system ( 22 ), according to claim 17 , wherein:
the first engagement surface ( 56 ) comprises a plurality of angularly spaced apart engagement recesses ( 62 ); and
members of each pair of circumferentially adjacent engagement recesses ( 62 ) are separated by a respective coolant ridge ( 78 ).

19. The tool holding system ( 122 ), according to claim 15 , wherein:
the inner coupling member ( 136 ) comprises a coolant groove ( 114 ) that extends the entire axial length of the inner coupling member ( 136 ); and
each coolant channel ( 76 ) is formed by the coolant groove and the outer coupling member ( 138 ).

20. A cutting tool ( 20 , 120 ), comprising:
a tool holding system ( 22 , 122 ) in accordance with claim 1 ; and
a cutting insert ( 24 ) located in the clamping bore ( 32 ) and clampingly engaged therein.

21. The cutting tool ( 20 ), according to claim 20 wherein:
the first engagement surface ( 56 ) comprises at least one engagement recess ( 62 );
the second engagement surface ( 58 ) comprises at least one engagement projection ( 60 );
each engagement projection ( 60 ) is located in a respective engagement recess ( 62 );
each engagement recess ( 62 ) comprises a central recess bottom surface ( 66 );
each recess bottom surface ( 66 ) comprises

Assignees

• Iscar Ltd

Inventors

• Shaheen Philip
• Fisher Raz

Classifications

• B23B2231/24

  Cooling or lubrication means · CPC title

• B23B2260/106

  Nuts · CPC title

• B23B2260/072

  Grooves · CPC title

• B33Y80/00

  Products made by additive manufacturing · CPC title

• B23B31/201

  Characterized by features relating primarily to remote control of the gripping means · CPC title