Parting blade and blade holder configured for conveyance of pressurized coolant
AssigneeIscar, Ltd.
InventorsAsaf MALKA, Dmitry GAL, Shimon ATHAD
Life of this patent
Estimating the term…
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.
Claims28
A method of cooling a cutting edge of a cutting insert mounted on a cutting portion (30) of an elongated parting blade (14) having a blade passageway (24) for conveyance of coolant from a blade inlet aperture (26) formed in a parting blade's first side surface (50A) to the cutting portion's blade outlet aperture (28), the method comprising:
- mounting the parting blade (14) in a blade holder (12) having a holder connection surface (54) facing the parting blade (14), the blade holder (12) further having a holder inlet aperture (18) connected to a holder outlet aperture (20) via a holder passageway (16), with the blade inlet aperture (26) in fluid communication with the holder outlet aperture (20);
- and
- conveying coolant into the holder inlet aperture (16) at a pressure in excess of 20 bar, and through the holder passageway (16) such that a velocity of the coolant is decreased by the time it exits at the holder outlet aperture (20);
- and
- passing the coolant from the holder outlet aperture (20) to the blade inlet aperture (26), through the blade passageway (24) and out the blade outlet aperture (28) in a direction towards the cutting edge.
A method of passing coolant under pressure through a cutting tool, comprising:
- providing an elongated parting blade (14) comprising:
- opposing first and second side surfaces (50A, 50B) extending between parallel first and second longitudinal mounting edges (92A, 92B) and between opposing first and second end edges (94A, 94B) which extend transverse to the longitudinal mounting edges;
- a cutting portion (30) which is associated with the first longitudinal mounting edge (92A) and the first end edge (94A), and comprising an insert seat (32);
- and
- a blade passageway (24) configured for being in fluid communication with a blade outlet aperture (28) and for conveyance of coolant, the blade passageway (24) extending from a blade inlet aperture (26) formed in at least one of the side surfaces to a blade outlet aperture (28) located at the cutting portion (30);
- supplying coolant to the blade inlet aperture (16) at a pressure in excess of 20 bar;
- and
- conveying the coolant through the blade passageway (24) and out the blade outlet aperture (28).
A method of passing coolant under pressure through a cutting tool, comprising:
- providing a blade holder (12) comprising:
- a blade seat (60) comprising a holder connection surface (54) and upper and lower longitudinal jaws (62A, 62B) disposed on opposing sides of the holder connection surface (54), and a holder passageway (16) configured for conveyance of coolant and comprising a coolant path (42) extending therethrough from a holder inlet aperture (18) to a holder outlet aperture (20) formed at the holder connection surface (54);
- characterized in that:
- the holder passageway (16) comprises a preceding portion (21) and a deceleration chamber (22) closer than the preceding portion (21) to the holder outlet aperture (20), and a transition region (88) at which the preceding portion (21) transforms into the deceleration chamber (22);
- in the preceding portion (21) at the transition region (88), the holder passageway (16) has a preceding portion cross-sectional area (Ap) extending perpendicular to the coolant path, wherein:
- the holder connection surface (54) is formed with a sealing element recess (64) that surrounds the holder outlet aperture (20);
- a sealing element (52) is mounted in the sealing element recess (64);
- in the deceleration chamber (22) at the transition region (88), the holder passageway (16) has a deceleration chamber cross-sectional area (AD1) extending perpendicular to the coolant path, wherein:
- the deceleration chamber cross-sectional area is greater than the preceding portion cross-sectional area;
- and/or
- the deceleration chamber (22) comprises a barrier surface (90) facing the coolant path of the preceding portion (21) at the transition region (88);
- supplying coolant to the holder inlet aperture (18) at a pressure in excess of 20 bar;
- and
- conveying the coolant through the holder passageway (16) and out the holder outlet aperture (20).
Dependencies are inferred from the claim text.