Parting blade and blade holder configured for conveyance of pressurized coolant

Patent metadata

Field	Value
Publication number	US-9993877-B2
Application number	US-201314375631-A
Country	US
Kind code	B2
Filing date	Feb 11, 2013
Priority date	Mar 6, 2012
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A cutting tool assembly includes a parting blade and a blade holder for holding same. The cutting tool assembly is configured for conveying pressurized coolant via the holder to a cutting portion of the parting blade. The blade holder includes a deceleration chamber configured for reducing the impact of the pressurized coolant against the parting blade.

First claim

The invention claimed is:

1. A blade holder comprising
a blade seat comprising a holder connection surface and longitudinal jaws disposed on opposing sides of the holder connection surface, and a holder passageway configured for conveyance of coolant and comprising a coolant path extending therethrough from a holder inlet aperture to a holder outlet aperture formed at the holder connection surface;
the holder passageway comprises a preceding portion and a deceleration chamber closer than the preceding portion to the holder outlet aperture, and a transition region at which the preceding portion transforms into the deceleration chamber;
in the preceding portion at the transition region, the holder passageway has a preceding portion cross-sectional area extending perpendicular to the coolant path,
in the deceleration chamber at the transition region, the holder passageway has a deceleration chamber cross-sectional area extending perpendicular to the coolant path, wherein:
the deceleration chamber comprises a barrier surface facing the coolant path of the preceding portion at the transition region;
the holder connection surface is formed with a sealing element recess that surrounds the holder outlet aperture; and
a sealing element is mounted in the sealing element recess.

2. The blade holder according to claim 1 , wherein the coolant path comprises a change of direction from the holder inlet aperture to the holder outlet aperture and the change in direction is a quarter turn and/or there is only one change in direction.

3. The blade holder according to claim 1 , wherein one or more of (a) the sealing element recess, (b) the sealing element, and (c) the holder outlet aperture is elongated along a longitudinal direction of the blade holder.

4. The blade holder according to claim 3 , wherein the one or more of (a) the sealing element recess, (b) the sealing element, and (c) the holder outlet aperture, is oval shaped.

5. The blade holder according to claim 1 , wherein defined between the sealing element recess and the holder outlet aperture is a holder outlet aperture wall.

6. The blade holder according to claim 1 , wherein the sealing element is configured to simultaneously contact all surfaces of the sealing element recess.

7. The blade holder according to claim 1 , wherein the sealing element has a cross sectional dimension equal to or larger than a recess distance, which is measurable between an outer peripheral surface and an inner peripheral surface thereof.

8. The blade holder according to claim 1 , wherein a sealing arrangement on the blade holder is constructed such that a projecting portion of the sealing element always projects a distance in a direction D P , which is perpendicular to a base surface of the sealing element recess, from the holder connection surface.

9. The blade holder according to claim 1 , wherein a recess depth of the sealing element recess is about 78% of the sealing element's diameter.

10. A cutting tool assembly comprising, in combination,
a parting blade,
a blade holder for holding the parting blade, and
a sealing element connected to both the parting blade and the blade holder;
the blade holder comprising:
a blade seat comprising a holder connection surface and longitudinal jaws disposed on opposing sides of the holder connection surface, and a holder passageway configured for conveyance of coolant and comprising a coolant path extending therethrough from a holder inlet aperture to a holder outlet aperture formed at the holder connection surface;
the holder passageway comprises a preceding portion and a deceleration chamber closer than the preceding portion to the holder outlet aperture, and a transition region at which the preceding portion transforms into the deceleration chamber;
in the preceding portion at the transition region, the holder passageway has a preceding portion cross-sectional area extending perpendicular to the coolant path,
in the deceleration chamber at the transition region, the holder passageway has a deceleration chamber cross-sectional area extending perpendicular to the coolant path, wherein:
the deceleration chamber comprises a barrier surface facing the coolant path of the preceding portion at the transition region.

11. The cutting tool assembly according to claim 10 , wherein the holder connection surface is formed with the sealing element recess that surrounds the holder outlet aperture and the sealing element is mounted in the sealing element recess.

12. The cutting tool assembly according to claim 10 , wherein the cutting tool assembly is configured for movement of the parting blade in the blade holder that is restricted by location of the sealing element and the parting blade.

13. The cutting tool assembly according to claim 10 , wherein the parting blade comprises a sealing aperture and the blade movement is restricted to a location of the sealing aperture.

14. The cutting tool assembly according to claim 13 , wherein the cutting tool assembly further comprises a removable sealing device for the sealing aperture.

15. The cutting tool assembly according to claim 10 , wherein longitudinal jaws of the blade holder are the outermost portions of the blade holder in an outward direction from a holder connection surface of the blade holder.

16. The cutting tool assembly according to claim 10 , wherein the sealing element is mounted in the sealing element recess of the blade holder and projects sufficiently therefrom to tilt the parting blade from a parallel orientation relative to a holder connection surface of the blade holder.

17. The cutting tool assembly according to claim 10 , wherein a sealing arrangement on the blade holder is constructed such that a projecting portion of the sealing element always projects a distance in a direction D P , which is perpendicular to a base surface of the sealing element recess, from a holder connection surface, even when the sealing element is compressed by contact with the parting blade.

18. The cutting tool assembly according to claim 10 , wherein defined between a sealing element recess and a holder outlet aperture is a holder outlet aperture wall.

19. The cutting tool assembly according to claim 10 , wherein the coolant path comprises a change of direction from the holder inlet aperture to the holder outlet aperture and the change in direction is a quarter turn and/or there is only one change in direction.

20. The cutting tool assembly according to claim 10 , wherein one or more of (a) the sealing element recess, (b) the sealing element, and (c) the holder outlet aperture is elongated along a longitudinal direction of the blade holder.

21. The cutting tool assembly according to claim 10 , wherein the deceleration chamber opens out to the holder outlet aperture, and the holder outlet aperture is elongated along a longitudinal direction of the blade holder.

22. The cutting tool assembly according to claim 21 , wherein the parting blade comprises:
opposing first and second side surfaces extending between parallel first and second longitudinal mounting edges and between opposing first and second end edges which extend transverse to the longitudinal mounting edges;
a cutting portion which is associated with the first longitudinal mounting edge and the first end edge, the cutting portion having an insert seat for retaining a cutting insert; and
a blade passageway configured for conveyance of coolant and extending from a blade inlet aperture formed in at least one of the side

Assignees

• Iscar Ltd

Inventors

• Malka Asaf
• Gal Dmitry
• Athad Shimon

Classifications

• B23B27/04

  Cutting-off tools (B23B27/08 takes precedence {; toolholders for cutting-off inserts B23B29/043}) · CPC title

• B23B29/043

  with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts (B23B29/14 takes precedence) · CPC title

• B23B2205/02

  Fixation using an elastically deformable clamping member · CPC title

• B23B27/086 Primary

  with yieldable support for the cutting insert · CPC title

• Y10T407/14

  with means to apply fluid to cutting tool · CPC title