External turning tool having a cutting portion with a transverse elongated damping mechanism

Patent metadata

Field	Value
Publication number	US-2019314902-A1
Application number	US-201815953726-A
Country	US
Kind code	A1
Filing date	Apr 16, 2018
Priority date	Apr 16, 2018
Publication date	Oct 17, 2019
Grant date	—

Abstract

An external turning tool includes an elongated tool body with opposite clamping and cutting portions which define an axial direction therebetween. The cutting portion includes a damping mechanism with an elongated damping member which defines an elongation axis. The elongation axis forms a non-zero damping member angle with the axial direction.

First claim

What is claimed is:

1 . A non-blade shaped external turning tool ( 10 ) comprising:
an elongated tool body ( 12 ) having opposite clamping and cutting portions ( 16 , 18 ) defining an axial direction (AD) therebetween; and a damping mechanism ( 20 ) at the cutting portion ( 18 ), the damping mechanism ( 20 ) comprising an elongated damping member ( 42 ) having an elongation axis (E);
wherein:
the elongation axis (E) forms a non-zero damping member angle (α) with the axial direction (AD).

2 . The external turning tool ( 10 ) according to claim 1 , wherein the damping member angle (α) ranges from 45 to 135 degrees.

3 . The external turning tool ( 10 ) according to claim 1 , wherein the damping member angle (α) ranges from 80 to 100 degrees.

4 . The external turning tool ( 10 ) according to claim 1 , wherein:
the external turning tool ( 10 ) has a tool axis (T) which extends centrally within the tool body ( 12 ), parallel to the axial direction (AD); and the damping member ( 42 ) has a center of mass (CM) which is offset from the tool axis (T).

5 . The external turning tool ( 10 ) according to claim 1 , wherein:
the damping member ( 42 ) has a maximum member length (ML) measured between extremities of the damping member ( 42 ) along the elongation axis (E); and the maximum member length (ML) is larger than a maximum member thickness (MT) measured between extremities in a direction perpendicular to the elongation axis (E).

6 . The external turning tool ( 10 ) according to claim 5 , wherein the maximum member length (ML) is at least 1.5 times larger than the maximum member thickness (MT).

7 . The external turning tool ( 10 ) according to claim 1 , wherein the cutting portion ( 18 ) has an elongated damping recess ( 40 ) configured to accommodate the damping member ( 42 ).

8 . The external turning tool ( 10 ) according to claim 7 , wherein:
the cutting portion ( 18 ) has opposite cutting portion top and bottom surfaces ( 29 , 31 ); and the damping recess ( 40 ) opens out to exactly one of the cutting portion top and bottom surfaces ( 29 , 31 ).

9 . The external turning tool ( 10 ) according to claim 1 , wherein the damping mechanism ( 20 ) comprises an elastic member ( 44 ).

10 . The external turning tool ( 10 ) according to claim 1 , wherein the damping mechanism ( 20 ) further comprises a lid ( 48 ) and a calibration mechanism ( 46 ) which is configured to apply a permanent force onto the damping member ( 42 ) against an elastic member ( 44 ).

11 . The external turning tool ( 10 ) according to claim 1 , wherein the damping member ( 42 ) is entirely confined within the cutting portion ( 18 ), such that no portion of the damping member ( 42 ) is visible in any view of the cutting portion.

12 . The external turning tool ( 10 ) according to claim 1 , wherein the cutting portion ( 18 ) has opposite cutting portion side surfaces ( 35 ); and wherein the elongation axis (E) does not intersect the cutting portion side surfaces ( 35 ).

13 . The external turning tool ( 10 ) according to claim 1 , wherein the damping member ( 42 ) has unitary one-piece construction.

14 . The external turning tool ( 10 ) according to claim 1 , wherein the damping member ( 42 ) is cylindrical.

15 . The external turning tool ( 10 ) according to claim 1 , further comprising a coolant conveyance assembly ( 36 ) including a coolant channel ( 38 ) which extends at least through the cutting portion ( 18 ).

16 . The external turning tool ( 10 ) according to claim 1 , wherein:
the cutting portion ( 18 ) has a different axial cross-sectional shape than that of the clamping portion ( 16 ).

17 . The external turning tool ( 10 ) according to claim 1 , wherein the damping mechanism ( 42 ) does not extend in a rearward direction into the clamping portion ( 16 ).

18 . The external turning tool ( 10 ) according to claim 1 , further comprising:
a turning insert ( 14 ) removably retained in a pocket ( 15 ) of the cutting portion ( 16 ).

19 . The external turning tool ( 10 ) according to claim 18 , wherein:
the turning insert ( 14 ) comprises a cutting edge ( 76 ) formed at an intersection between a rake surface ( 78 ) and a relief surface ( 80 ); and the elongation axis (E) extends parallel or substantially parallel to the relief surface ( 78 ).

20 . The external turning tool ( 10 ) according to claim 18 , wherein a plane (P) perpendicular to the axial direction (AD) intersects both the turning insert ( 14 ) and the damping mechanism ( 20 ).

21 . The external turning tool ( 10 ) according to claim 18 , wherein:
in a top view of the external turning tool ( 10 ), a center of mass (CM) of the damping member ( 42 ) is not located directly under the turning insert ( 14 ).

22 . The external turning tool ( 10 ) according to claim 18 , wherein:
the external turning tool ( 10 ) has a tool axis (T) which extends centrally within the tool body ( 12 ) parallel to the axial direction (AD), and in a top view of the external turning tool ( 10 ), a center of mass (CM) of the damping member ( 42 ) and the turning insert ( 14 ) are located on opposite sides of the tool axis (T).

23 . The external turning tool ( 10 ) according to claim 18 , wherein:
the damping member ( 42 ) is entirely confined within the cutting portion ( 16 ) such that no portion of the damping member ( 42 ) is visible in any view of the cutting portion ( 16 ); and the elongation axis (E) ranges from 45 to 135 degrees.

24 . The external turning tool ( 10 ) according to claim 23 , wherein the cutting portion ( 18 ) has a different axial cross-sectional shape than that of the clamping portion ( 16 ).

25 . The external turning tool ( 10 ) according to claim 23 , wherein the damping mechanism ( 42 ) does not extend in a rearward direction into the clamping portion ( 16 ).

26 . The external turning tool ( 10 ) according to claim 18 , wherein:
the damping member ( 42 ) is entirely confined within the cutting portion ( 16 ) such that no portion of the damping member ( 42 ) is visible in any view of the cutting portion ( 16 ); and the damping member ( 42 ) interacts with the tool body ( 12 ) via a viscous material.

27 . The external turning tool ( 10 ) according to claim 26 , wherein the cutting portion ( 18 ) has a different axial cross-sectional shape than that of the clamping portion ( 16 ).

28 . The external turning tool ( 10 ) according to claim 26 , wherein the damping mechanism ( 42 ) does not extend in a rearward direction into the clamping portion ( 16 ).

Assignees

• Iscar Ltd

Inventors

• Herman Meir
• Saffouri Jony
• Hen Meir Bar

Classifications

• B23B29/022

  with vibration reducing means · CPC title

• B23B2250/16

  Damping of vibrations · CPC title

• B23B27/002 Primary

  with vibration damping means · CPC title

• B23B2250/12

  Cooling and lubrication · CPC title

• B23B27/14 Primary

  Cutting tools of which the bits or tips {or cutting inserts} are of special material · CPC title