Cutting tool having a coolant chamber with an integrally formed coolant deflection portion and tool body

Patent metadata

Field	Value
Publication number	US-10201862-B2
Application number	US-201715651494-A
Country	US
Kind code	B2
Filing date	Jul 17, 2017
Priority date	Sep 7, 2016
Publication date	Feb 12, 2019
Grant date	Feb 12, 2019

Abstract

A cutting tool includes a replaceable cutting insert and a tool body. The tool body includes a tool body surface and an insert pocket recessed therein. The cutting insert is releasably retained in the insert pocket. The tool body includes at least one coolant duct that has an outlet orifice that opens out in a coolant chamber. The coolant chamber is bounded on a side opposite the outlet orifice by a coolant deflection portion that is integrally formed with the tool body in a unitary one-piece construction and at least partially overhangs the outlet orifice in a direction towards the insert pocket. The coolant deflection portion has a chamber deflection surface configured to deflect a coolant in the direction of a cutting edge of a cutting insert seated in insert pocket.

First claim

What is claimed is:

1. A cutting tool ( 20 ) having a central tool axis (A) extending in a forward direction (D F ) to a rearward direction (D R ), the cutting tool comprising:
a tool body ( 24 ) comprising a tool body surface ( 26 ) and an insert pocket ( 28 ) recessed therein; and
a cutting insert ( 22 ) releasably retained in the insert pocket ( 28 ), wherein:
the tool body ( 24 ) comprises:
a coolant chamber ( 44 ) that opens out to the tool body surface ( 26 ) at a coolant chamber opening ( 46 ); and
at least one coolant duct ( 60 a , 60 b ) that opens out at an outlet orifice ( 56 ) in the coolant chamber ( 44 ); and:
the coolant chamber ( 44 ) is bounded on a side opposite the outlet orifice ( 56 ) by a coolant deflection portion ( 58 ) that is integrally formed with the tool body ( 24 ) in a unitary one-piece construction and at least partially overhangs the outlet orifice ( 56 ) in a direction towards the insert pocket ( 28 ).

2. The cutting tool ( 20 ), according to claim 1 , wherein the coolant deflection portion ( 58 ) completely overhangs the outlet orifice ( 56 ).

3. The cutting tool ( 20 ), according to claim 1 , wherein the coolant chamber ( 44 ) is recessed in the tool body surface ( 26 ) so that the coolant deflection portion ( 58 ) does not protrude from the tool body surface ( 26 ).

4. The cutting tool ( 20 ), according to claim 1 , wherein the coolant chamber opening ( 46 ) is spaced apart from the insert pocket ( 28 ).

5. The cutting tool ( 20 ), according to claim 1 , wherein the outlet orifice ( 56 ) is generally circular.

6. The cutting tool ( 20 ), according to claim 1 , wherein:
the coolant chamber ( 44 ) is formed peripherally by a chamber deflection surface ( 50 ) and a chamber orifice surface ( 52 ) that oppose each other and two opposing chamber minor surfaces ( 54 ) which connect the chamber deflection surface ( 50 ) and the chamber orifice surface ( 52 );
the chamber deflection surface ( 50 ) is located on the coolant deflection portion ( 58 ); and
the outlet orifice ( 56 ) is located on the chamber orifice surface ( 52 ).

7. The cutting tool ( 20 ), according to claim 6 , wherein:
the chamber deflection surface ( 50 ) and the chamber orifice surface ( 52 ) are planar; and
the two chamber minor surfaces ( 54 ) are concavely curved.

8. The cutting tool ( 20 ), according to claim 6 , wherein:
the outlet orifice ( 56 ) defines an outlet orifice plane (P);
the outlet orifice ( 56 ) has an outlet orifice axis (O) which is perpendicular to the outlet orifice plane (P);
the chamber deflection surface ( 50 ) forms a chamber deflection angle (β) with the outlet orifice axis (O); and
the chamber deflection angle (β) is in the range 90°<β<130°.

9. The cutting tool ( 20 ), according to claim 8 , wherein the chamber orifice surface ( 52 ) is parallel to the outlet orifice plane (P).

10. The cutting tool ( 20 ), according to claim 6 , wherein:
the coolant chamber ( 44 ) extends along a chamber central axis (C) that passes between the chamber deflection surface ( 50 ), the chamber orifice surface ( 52 ) and the chamber minor surfaces ( 54 ); and
as measured in a cross-sectional plane perpendicular to the chamber central axis (C), the coolant chamber ( 44 ) has an increasing cross-section, in a direction towards the coolant chamber opening ( 46 ).

11. The cutting tool ( 20 ), according to claim 6 , wherein:
the coolant chamber ( 44 ) extends along a chamber central axis (C); and
in a cross sectional plane perpendicular to the chamber central axis (C), the chamber deflection surface ( 50 ) and the chamber orifice surface ( 52 ) are longer than the two chamber minor surfaces ( 54 ).

12. The cutting tool ( 20 ), according to claim 11 , wherein:
the cutting insert ( 22 ) comprises a cutting edge ( 38 ); and
the coolant chamber opening ( 46 ) has an elongated shape extending longitudinally generally in the same direction as the cutting edge ( 38 ).

13. The cutting tool ( 20 ), according to claim 12 , wherein the length of the coolant chamber opening ( 46 ) is at least 50% the length of the cutting edge ( 38 ).

14. The cutting tool ( 20 ), according to claim 1 , wherein exactly two coolant ducts ( 60 a , 60 b ) open out at the outlet orifice ( 56 ) in the coolant chamber ( 44 ).

15. The cutting tool ( 20 ), according to claim 14 , wherein:
the insert pocket ( 28 ) comprises a pocket base surface ( 30 ) and a threaded bore ( 34 ) opening out thereto; and
the two coolant ducts ( 60 a , 60 b ) extend on either side of the threaded bore ( 34 ).

16. The cutting tool ( 20 ), according to claim 1 , wherein
the cutting tool ( 20 ) is configured to rotate in a direction of rotation (R) around the central tool axis (A);
the tool body ( 24 ) comprises a forward facing body face surface ( 66 ) and a body periphery surface ( 68 ), the body periphery surface ( 68 ) extending circumferentially along the central tool axis (A) and forming a boundary of the body face surface ( 66 ) at a forward end of the cutting tool ( 20 ); and
the coolant chamber opening ( 46 ) is located rotationally behind the insert pocket ( 28 ).

17. The cutting tool ( 20 ), according to claim 16 , wherein the coolant chamber opening ( 46 ) and the insert pocket ( 28 ) are aligned in the circumferential direction of the cutting tool ( 20 ).

18. The cutting tool ( 20 ), according to claim 1 , wherein
the cutting tool ( 20 ) is configured to rotate in a direction of rotation (R) around the central tool axis (A);
the tool body ( 24 ) comprises a forward facing body face surface ( 66 ) and a body periphery surface ( 68 ), the body periphery surface ( 68 ) extending circumferentially along the central tool axis (A) and forming a boundary of the body face surface ( 66 ) at a forward end of the cutting tool ( 20 );
the insert pocket ( 28 ) opens out to the body face surface ( 66 ); and
the coolant chamber opening ( 46 ) is angularly aligned with the insert pocket ( 28 ) about the central tool axis (A).

19. The cutting tool ( 20 ), according to claim 16 , wherein the cutting tool ( 20 ) is a rotary milling cutter.

20. A cutting tool ( 20 ) having a central tool axis (A) extending in a forward direction (D F ) to a rearward direction (D R ), the cutting tool comprising:
a tool body ( 24 ) comprising a tool body surface ( 26 ) and an insert pocket ( 28 ) recessed therein; and
a cutting insert ( 22 ) releasably retained in the insert pocket ( 28 ), wherein:
the tool body ( 24 ) comprises:
a coolant chamber ( 44 ) that opens out to the tool body surface ( 26 ) at a coolant chamber opening ( 46 );
at least one coolant duct ( 60 a , 60 b ) that opens out at an outlet orifice ( 56 ) in the coolant chamber ( 44 );
the coolant chamber ( 44 ) is bounded on a side opposite the outlet orifice ( 56 ) by a coolant deflection portion ( 58 ) that is integrally formed with the tool body ( 24 ) in a unitary one-piece construction; and
in a front view of the coolant chamber ( 44 ), the outlet orifice ( 56 ) is at least partially hidden by the coolant deflection portion ( 58 ).

21. A tool body ( 24 ) comprising a tool body surface ( 26 ) and an insert pocket ( 28 ) for seating of a cutting insert ( 22 ), recessed therein; wherein:
the tool body ( 24 ) comprises:
a coolant chamber ( 44 ) that opens out to the tool body surface ( 26 ) at a coolant chamber opening ( 46 ); and
at least one coolant duct ( 60 a , 60 b ) that opens out at an outlet orifice ( 56 ) in the coolant

Assignees

• Iscar Ltd

Inventors

• Kachler Ilan

Classifications

• 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

• B23C2210/165

  Fixation bolts · CPC title

• B23C2250/12

  Cooling and lubrication · CPC title

• B23C5/109 Primary

  with removable cutting inserts · CPC title

• B23B2205/04

  Fixation screws, bolts or pins of particular form · CPC title