US 11,318,541 B2Granted

Light-weight tool holder with coolant cavity having varying cross-sectional area and cutting tool

AssigneeIscar, Ltd.

InventorsChen Blabes, Hadas Moyal

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Abstract

A tool holder includes a coolant cavity opening out to a cavity inlet and outlet openings. The coolant cavity includes a cavity upper surface which extends along a cavity central axis. The cavity upper surface includes a cavity widening surface firstly which decreases in distance from the holder peripheral surface and secondly along which the cavity cross-sectional area increases, both with increasing distance from the cavity inlet opening. The cavity upper surface also includes a cavity narrowing surface, located further from the cavity inlet opening than the cavity widening surface, firstly which increases in distance from the holder peripheral surface and secondly along which the cavity cross-sectional area decreases, with increasing distance from the cavity inlet opening. A cutting tool is provided having a cutting insert releasably attached to the tool holder.

Claims34

Dependent claims

A light-weight tool holder (22), elongated along a holder longitudinal axis (B) thereof, the holder longitudinal axis (B) defining opposite forward and rearward directions (DF, DR), the tool holder (22) being integrally formed to have unitary one-piece construction and comprising:

a holder forward end surface (28), a holder rearward end surface (30) and a holder peripheral surface (36) extending therebetween, the holder peripheral surface (36) extending about the holder longitudinal axis (B);
an insert pocket (44a), for releasably retaining a cutting insert (24), located at a forward end (32) of the tool holder (22);
a shank portion (46) extending rearwardly from the insert pocket (44a);
and
a coolant cavity (48a) having a cavity central axis (F), a cavity inlet opening (52), at least one cavity outlet opening (54) and a cavity weight-reducing portion (58) between the cavity inlet opening (52) and the at least one cavity outlet opening (54);
wherein:
the cavity weight reducing portion (58) has a cavity cross-sectional area (CA) extending in a radial plane perpendicular to the holder longitudinal axis (B);
and
the cavity weight reducing portion (58) comprises a cavity weight-reducing peripheral surface (60), extending about the cavity central axis (F), and comprising a cavity upper surface (62) extending along the cavity central axis (F), the cavity upper surface (62) comprising:
a cavity widening surface portion (70), which decreases in distance from the holder peripheral surface (36), and along which the cavity cross-sectional area (CA) increases, both with increasing distance from the cavity inlet opening (52);
and
a cavity narrowing surface portion (72), located further from the cavity inlet opening (52) than the cavity widening surface portion (70), which increases in distance from the holder peripheral surface (36), and along which the cavity cross-sectional area (CA) decreases, both with increasing distance from the cavity inlet opening (52).

9 more elements

a holder forward end surface (28), a holder rearward end surface (30) and a holder peripheral surface (36) extending therebetween, the holder peripheral surface (36) extending about the holder longitudinal axis (B);
an insert pocket (44a), for releasably retaining a cutting insert (24), located at a forward end (32) of the tool holder (22);
a shank portion (46) extending rearwardly from the insert pocket (44a);
and
a coolant cavity (48a) having a cavity central axis (F), a cavity inlet opening (52), at least one cavity outlet opening (54) and a cavity weight-reducing portion (58) between the cavity inlet opening (52) and the at least one cavity outlet opening (54);
wherein:
a length of the cavity weight reducing portion (58) extends between 50%-90% of a distance (DL) along the holder longitudinal axis (B) between the cavity inlet opening (52) and the at least one outlet opening (54);
along a length of the cavity weight reducing portion (58), the coolant cavity (48a) has a cavity volume VC and the tool holder (22) has a total volume of VT;
and
the cavity volume and the tool holder volume have a ratio that satisfies 0.2≤VC/VT≤0.7.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/916,622Filed 30 Jun 2020
Published: US 2021/0402489 A130 Dec 2021
Granted: 3 May 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

B23B 29/043
Tool holders for a single cutting tool: with cutting-off, grooving or profile cutting tools, i.e. blade- or disc-like main cutting parts
B23B 29/12
Tool holders for a single cutting tool: special arrangements on tool holders
B23B 27/086
Cutting tools with blade- or disc-like main parts: with yieldable support for the cutting insert
B23B 27/10
Tools for turning or boring machines ; Tools of a similar kind in general; Accessories therefor: cutting tools with special provision for cooling