Tool holder having position adjustment arrangement and cutting tool

Patent metadata

Field	Value
Publication number	US-10144071-B2
Application number	US-201715460413-A
Country	US
Kind code	B2
Filing date	Mar 16, 2017
Priority date	Mar 16, 2017
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A cutting tool includes a tool holder, having a holder pocket with a pocket opening, and a cutting member releasably retained therein. The tool holder includes an adjustment cavity that includes circumferentially merging threaded and guiding bore portions. The tool holder further includes an adjustment arrangement that includes an adjustment member including a wedge adjustment portion and a guiding portion integrally formed therewith. The adjusting arrangement further includes an adjustment screw. The wedge adjustment portion is located in the pocket adjustment region and the guiding portion is located in the guiding bore portion and partially protrudes into the threaded bore portion. The adjustment screw is threadingly rotatable between a first rotated position and a second rotated position, and in the second rotated position the adjustment member, and thus the cutting member, is located closer to the pocket opening than in the first rotated position.

First claim

What is claimed is:

1. A tool holder ( 22 ), having a holder central axis (B) defining opposite forward and rearward directions (D F , D R ), the tool holder ( 22 ) comprising:
a holder face surface ( 48 ) and a holder peripheral surface ( 50 ) extending rearwardly and circumferentially along the holder central axis (B) from the holder face surface ( 48 );
a holder pocket ( 26 ) recessed in the tool holder ( 22 ) and comprising a pocket opening ( 52 ) which opens out to one of the holder peripheral surface ( 50 ) and holder face surface ( 48 ), and further comprising a pocket adjustment region ( 54 ) located at an opposing end of holder pocket ( 26 ) to the pocket opening ( 52 ); and
an adjustment cavity ( 63 ), recessed in and opening out to whichever one of the holder peripheral surface ( 50 ) and holder face surface ( 48 ) the pocket opening ( 52 ) does not open out to, the adjustment cavity ( 63 ) comprising circumferentially merging threaded and guiding bore portions ( 64 , 66 ), the guiding bore portion ( 66 ) adjoining the pocket adjustment region ( 54 ).

2. The tool holder ( 22 ), according to claim 1 , further comprising:
an adjustment arrangement ( 28 ) comprising:
an adjustment member ( 70 ) comprising a wedge adjustment portion ( 62 ) and a guiding portion ( 72 ) integrally formed therewith, the guiding portion ( 72 ) comprising an actuating groove ( 78 ); and
an adjustment screw ( 92 ) comprising an adjustment screw head ( 94 ); wherein
the wedge adjustment portion ( 62 ) is located in the pocket adjustment region ( 54 );
the guiding portion ( 72 ) is located in the guiding bore portion ( 66 ) and partially protrudes into the threaded bore portion ( 64 ) so that the actuating groove ( 78 ) is located therein;
the adjustment screw ( 92 ) is threadingly received in the threaded bore portion ( 64 );
the adjustment screw head ( 94 ) is located in the actuating groove ( 78 ); and
the adjustment screw ( 92 ) is threadingly rotatable between a first rotated position and a second rotated position, and in the first rotated position the adjustment member ( 70 ) is located closer to the pocket opening ( 52 ) than in the second rotated position.

3. The tool holder ( 22 ), according to claim 2 , wherein:
the guiding portion ( 72 ) comprises two opposing guiding portion end surfaces ( 74 ) and a guiding portion peripheral surface ( 76 ) extending therebetween;
the guiding portion peripheral surface ( 76 ) extends circumferentially along an adjustment arrangement major axis (M) that intersects the two guiding portion end surfaces ( 74 ); and
the actuating groove ( 78 ) is recessed in the guiding portion peripheral surface ( 76 ).

4. The tool holder ( 22 ), according to claim 3 , wherein the actuating groove ( 78 ) comprises first and second groove side surfaces ( 79 a , 79 b ) which face each other and are spaced apart by a concavely curved groove central surface ( 79 c ).

5. The tool holder ( 22 ), according to claim 3 , wherein, as measured in the direction of the adjustment arrangement major axis (M), a groove width (W) of the actuating groove ( 78 ) is greater than 50% of a guiding portion length (L) of the guiding portion ( 72 ).

6. The tool holder ( 22 ), according to claim 3 , wherein the guiding portion ( 72 ) has a shape that corresponds to the guiding bore portion ( 66 ).

7. The tool holder ( 22 ), according to claim 3 , wherein:
the wedge adjustment portion ( 62 ) comprises two opposing wedge end surfaces ( 80 a , 80 b ) and a wedge peripheral surface ( 82 ) extending therebetween, the wedge peripheral surface ( 82 ) comprising:
opposing wedge rear and forward contact surfaces ( 84 , 86 ), and opposing a wedge top and bottom surfaces ( 88 a , 88 b ), wherein:
the wedge top surface ( 88 a ) connects the wedge rear and front contact surfaces ( 84 , 86 );
the wedge rear contact surface ( 84 ) connects the wedge top surface ( 88 a ) and the guiding portion peripheral surface ( 76 ); and
the wedge bottom surface ( 88 b ) connects the wedge front contact surface ( 86 ) and the guiding portion peripheral surface ( 76 ).

8. The tool holder ( 22 ), according to claim 7 , wherein the wedge adjustment portion ( 62 ) is integrally formed with the guiding portion ( 72 ) at a guiding neck portion ( 90 ) that is narrower than the guiding portion ( 72 ).

9. The tool holder ( 22 ), according to claim 7 , wherein the wedge front contact surface ( 86 ) faces towards the pocket opening ( 52 ), is planar and is perpendicular to the holder central axis (B).

10. The tool holder ( 22 ), according to claim 7 , wherein the wedge front contact surface ( 86 ) and the wedge rear contact surface ( 84 ) taper towards each other at an acute wedge angle (μ).

11. The tool holder ( 22 ), according to claim 10 , wherein the wedge front contact surface ( 86 ) and the wedge rear contact surface ( 84 ) taper towards each other in a direction away from whichever one of the holder peripheral surface ( 50 ) and holder face surface ( 48 ) the pocket opening ( 52 ) does not open out to.

12. The tool holder ( 22 ), according to claim 2 , wherein the adjustment member ( 70 ) comprises an additively manufactured metallic unit.

13. The tool holder ( 22 ), according to claim 1 , wherein:
the guiding bore portion ( 66 ) extends along a guiding bore portion axis (G);
the threaded bore portion ( 64 ) extends along a threaded bore portion axis (T); and
the guiding bore portion axis (G) is parallel to the threaded bore portion axis (T) and spaced apart therefrom.

14. The tool holder ( 22 ) according to claim 13 , wherein:
the holder pocket ( 26 ) comprises a pocket base surface ( 56 ), and a pocket peripheral surface ( 58 ) oriented substantially perpendicularly thereto and forming a partial boundary thereof; and
the pocket peripheral surface ( 58 ) comprises a pocket support surface ( 60 ) that is planar and parallel to the guiding bore portion axis (G).

15. The tool holder ( 22 ), according to claim 14 , wherein:
the guiding bore portion ( 66 ) comprises a guiding bore portion peripheral surface ( 68 ) that extends circumferentially along the guiding bore portion axis (G);
the guiding bore portion peripheral surface ( 68 ) extends to a support edge ( 60 a ) of the pocket support surface ( 60 ); and
the guiding bore portion peripheral surface ( 68 ) extends to a base edge ( 56 a ) of the pocket base surface ( 56 ).

16. The tool holder ( 22 ), according to claim 13 , wherein:
the holder pocket ( 26 ) has an adjustment axis (A) that extends through the pocket adjustment region ( 54 ) and the pocket opening ( 52 ), defining opposite first and second adjustment direction (A 1 , A 2 ); and
in a view perpendicular to a pocket median plane (PP), the guiding bore portion axis (G) is oriented obliquely with respect to the adjustment axis (A).

17. The tool holder ( 22 ), according to claim 16 , wherein the guiding bore portion axis (G) and the adjustment axis (A) form an obtuse guiding angle (α), the guiding angle (α) being measured through the holder pocket ( 26 ).

18. The tool holder ( 22 ), according to claim 16 , wherein in a view perpendicular to the pocket median plane (PP), the adjustment axis (A) is parallel to the holder central axis (B).

19. The tool holder ( 22 ), according to claim 16 , wherein in a plane perpendicular to the guiding bore portion axis (G), the guiding bore portion ( 66 ) has a constant guiding bore cross-section along the guiding bore portion axis (G).

20. The tool holder

Assignees

• Iscar Ltd

Inventors

• Zettler Martin

Classifications

• B23C5/06

  Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface · CPC title

• B23C2210/16

  Fixation of inserts or cutting bits in the tool · CPC title

• B23C2240/24

  Connections using screws · CPC title

• B23C5/2472 Primary

  the adjusting means being screws · CPC title

• B23C5/2239

  with cutting inserts clamped by a clamping member acting almost perpendicular on the cutting face · CPC title