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

Patent metadata

Field	Value
Publication number	US-10953471-B2
Application number	US-201815953726-A
Country	US
Kind code	B2
Filing date	Apr 16, 2018
Priority date	Apr 16, 2018
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

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, the axial direction (AD) establishing a forward-to-rearward direction of the tool body ( 12 ) with the cutting portion ( 18 ) being axially forward of the clamping portion ( 16 );
the cutting portion ( 18 ) comprising:
cutting portion top and bottom surfaces ( 29 , 31 );
cutting portion side surfaces ( 35 ) extending between the cutting portion top and bottom surfaces ( 29 , 31 );
an elongated damping recess ( 40 ) formed in the cutting portion ( 18 ), the damping recess ( 40 ) extending longitudinally along a recess elongation axis (RE) and comprising a recess wall ( 60 ) centered about the recess elongation axis (RE), the damping recess ( 40 ) being in the form of a blind hole having an opening ( 58 ) which opens out to exactly one of the cutting portion top and bottom surfaces ( 29 , 31 ); and
a damping mechanism ( 20 ) comprising an elongated damping weight ( 42 ) having an elongation axis (E) aligned with the recess elongation axis (RE), the damping weight ( 42 ) occupying the damping recess ( 40 ); wherein:

the damping mechanism ( 20 ) further comprises an elastic member ( 44 );
the elongation axis (E) forms a non-zero damping member angle (α) with the axial direction (AD); and
the elongation axis (E) and the recess elongation axis (RE) both pass through the opening ( 58 ) and intersect imaginary planes (P 1 , P 2 ) defined by the top and bottom surfaces ( 29 , 31 ).

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 weight ( 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 weight ( 42 ) has a maximum member length (ML) measured between extremities of the damping weight ( 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 damping mechanism ( 20 ) further comprises a lid ( 48 ) and a calibration mechanism ( 46 ) which is configured to apply a permanent force onto the damping weight ( 42 ) against an elastic member ( 44 ), the permanent force being applied in a direction parallel to the elongation axis (E).

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

9. The external turning tool ( 10 ) according to claim 1 , wherein the elongation axis (E) does not intersect the cutting portion side surfaces ( 35 ).

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

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

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

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

14. The external turning tool ( 10 ) according to claim 1 , wherein the damping weight ( 42 ) does not overlap the clamping portion ( 16 ) in the axial direction (AD) and does not extend in a rearward direction into the clamping portion ( 16 ).

15. 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 ).

16. The external turning tool ( 10 ) according to claim 15 , 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 ).

17. The external turning tool ( 10 ) according to claim 15 , wherein a plane (P) perpendicular to the axial direction (AD) intersects both the turning insert ( 14 ) and the damping mechanism ( 20 ).

18. The external turning tool ( 10 ) according to claim 15 , wherein:
in a top view of the external turning tool ( 10 ), a center of mass (CM) of the damping weight ( 42 ) is not located directly under the turning insert ( 14 ).

19. The external turning tool ( 10 ) according to claim 15 , 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 weight ( 42 ) and the turning insert ( 14 ) are located on opposite sides of the tool axis (T).

20. The external turning tool ( 10 ) according to claim 15 , wherein:
the damping weight ( 42 ) is entirely confined within the cutting portion ( 16 ) such that no portion of the damping weight ( 42 ) is visible in any view of the cutting portion ( 16 ); and
the damping member angle (α) ranges from 45 to 135 degrees.

21. The external turning tool ( 10 ) according to claim 20 , wherein the cutting portion ( 18 ) has a different cross-sectional shape than that of the clamping portion ( 16 ), in cross-sections taken perpendicular to the axial direction (AD).

22. The external turning tool ( 10 ) according to claim 20 , wherein the damping weight ( 42 ) does not overlap the clamping portion ( 16 ) in the axial direction (AD) and does not extend in a rearward direction into the clamping portion ( 16 ).

23. The external turning tool ( 10 ) according to claim 15 , wherein:
the damping weight ( 42 ) is entirely confined within the cutting portion ( 16 ) such that no portion of the damping weight ( 42 ) is visible in any view of the cutting portion ( 16 ); and
the damping weight ( 42 ) interacts with the tool body ( 12 ) via a viscous material.

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

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

26. The external turning tool ( 10 ) according to claim 1 ,

Assignees

• Iscar Ltd

Inventors

• Herman Meir
• Saffouri Jony
• Bar Hen Meir

Classifications

• B23B29/022

  with vibration reducing 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

• B23B27/10

  Cutting tools with special provision for cooling {(drills with lubricating or cooling equipment B23B51/06; features relating to lubricating or cooling of milling cutters B23C5/28; arrangements or devices for cooling or lubricating tools or work B23Q11/10)} · CPC title

• B23B2210/00

  Details of turning tools · CPC title