Rotating tool having a tool anchorage arrangement following a stepped path and method of positioning said tool

Patent metadata

Field	Value
Publication number	US-10744571-B2
Application number	US-201916364816-A
Country	US
Kind code	B2
Filing date	Mar 26, 2019
Priority date	Sep 29, 2016
Publication date	Aug 18, 2020
Grant date	Aug 18, 2020

Abstract

A rotating tool includes a circumferential surface formed with a tool anchorage arrangement. The tool anchorage arrangement follows a stepped path. The tool anchorage arrangement includes an entry recess and, subsequent thereto, a radial recess and, subsequent thereto, an axial recess. Additional radial and axial recesses may be alternated to increase the number of steps, thereby extending the length of the stepped path.

First claim

What is claimed is:

1. A rotating tool having a tool axis defining opposite tool forward and backward directions and opposite tool rotation and reverse-rotation directions, the rotating tool comprising:
a rear end;
a front end located forward of the rear end; and
a circumferential surface extending forward of the rear end;

the circumferential surface being formed with a tool anchorage arrangement;
the tool anchorage arrangement following a stepped path, the stepped path comprising:
an entry recess extending forward from the rear end;
a radial recess intersecting, and extending in the tool rotation direction from, the entry recess;
an axial recess intersecting, and extending forward from, the radial recess;
an additional radial recess intersecting, and extending in the tool rotation direction from, the axial recess, the additional radial recess being axially forward of the radial recess, along the tool axis; and
an additional axial recess intersecting, and extending forward from, the additional radial recess.

2. The rotating tool according to claim 1 , wherein:
a starting recess of the tool anchorage arrangement is constituted by said entry recess; and
an ending recess, distally located from the entry recess, is a radial recess intersecting, and extending in the tool rotation direction from, a preceding axial recess.

3. The rotating tool according to claim 1 , wherein each radial recess has the same geometry as every other radial recess.

4. The rotating tool according to claim 1 , wherein each axial recess has the same geometry as every other axial recess.

5. The rotating tool according to claim 1 , wherein an extension of each radial recess extends in a direction perpendicular to the tool axis.

6. The rotating tool according to claim 1 , wherein an extension of each axial recess extends in a direction parallel to the tool axis.

7. The rotating tool according to claim 1 , wherein each radial recess further comprises an alignment portion which extends further in the tool rotation direction than a preceding axial recess.

8. The rotating tool according to claim 7 , wherein the alignment portion has a tapering shape.

9. The rotating tool according to claim 7 , wherein the alignment portion has an alignment height measurable parallel to the tool axis, the alignment height being smaller than an axial height of said preceding axial recess.

10. The rotating tool according to claim 1 , further comprising two additional tool anchorage arrangements circumferentially spaced apart from one another, wherein each of the anchorage arrangements have the same geometry.

11. The rotating tool according to claim 10 , wherein the entry recesses of the tool anchorage arrangements are equally circumferentially spaced about the tool axis.

12. The rotating tool according to claim 1 , further comprising a cutting portion configured for machining when the rotating tool is rotated relative to a workpiece in the tool rotation direction.

13. The rotating tool according to claim 1 , wherein the circumferential surface is an external surface of the tool.

14. The rotating tool according to claim 1 , wherein the circumferential surface has a cylindrical shape.

15. A method of positioning a rotating tool in accordance with claim 1 in a chuck; the tool's circumferential surface being an external surface of the tool; the chuck comprising an internal circumferential surface defining a tool-receiving bore and a bore axis defining opposite component forward and backward directions and opposite component rotation and rear-rotation directions; the bore surface being formed with a mating anchorage arrangement configured to mate with the tool anchorage arrangement and comprising at least one protuberance extending inwardly into the bore; the method comprising the steps of:
(a) inserting the rotating tool's rear end into the chuck's tool-receiving bore in the component backward direction such that the at least one protuberance projects into the entry recess;
(b) subsequent to step (a), rotating the rotating tool relative to the chuck such that the at least one protuberance projects into the radial recess;
(c) subsequent to step (b), moving the rotating tool further in the component backward direction such that the at least one protuberance projects into the axial recess; and
(d) subsequent to step (c), if the rotating tool has not yet reached a final position in the chuck, repeating step (b) and, if needed, step (c) repeatedly so that the at least protuberance projects into one or more additional radial and axial recesses until the rotating tool is at said final position in the chuck.

16. The method according to claim 15 , wherein the radial recess further comprises an alignment portion which extends further in the tool rotation direction than the axial recess, and
step (b) further comprises rotating the tool relative to the chuck until the at least one protuberance projects into the alignment portion, and
step (c) further comprises an initial sub-step of rotating the rotating tool relative to the chuck in a reverse-rotation direction a smaller amount than said rotation in step (b) such that the at least one protuberance is aligned with the axial recess to allow said moving of the rotating tool further in the component backward direction, as defined in step (c).

17. The rotating tool according to claim 1 , wherein the stepped path comprises three or more radial recesses, each at different axial locations along the tool axis.

18. A rotating tool having a tool axis defining opposite tool forward and backward directions and opposite tool rotation and reverse-rotation directions, the rotating tool comprising:
a rear end;
a front end located forward of the rear end; and
a circumferential surface extending forward of the rear end;

the circumferential surface being formed with a tool anchorage arrangement;
the tool anchorage arrangement following a stepped path, the stepped path comprising:
an entry recess extending forward from the rear end;
a radial recess intersecting, and extending in the tool rotation direction from, the entry recess;
an axial recess intersecting, and extending forward from, the radial recess;
an additional radial recess intersecting, and extending in the tool rotation direction from, the axial recess; and
an additional axial recess intersecting, and extending forward from, the additional radial recess; wherein:
the stepped path comprises a total of three or more radial recesses, each at different axial locations along the tool axis.

Assignees

• Iscar Ltd

Inventors

• Fisher Raz
• Guy Hanoch

Classifications

• B23B2231/0268

  Radial grooves · CPC title

• B23B31/028

  the axial positioning of the tool being adjustable (B23B31/208 takes precedence; with means for adjusting the chuck with respect to the working spindle B23B31/36) · CPC title

• B23B31/113

  Retention by bayonet connection · CPC title

• B23B31/005 Primary

  Cylindrical shanks of tools · CPC title

• B23B2231/0256

  Flats · CPC title