Shank and cutting tool having the shank

Patent metadata

Field	Value
Publication number	US-12337395-B2
Application number	US-202318338983-A
Country	US
Kind code	B2
Filing date	Jun 21, 2023
Priority date	Jun 22, 2022
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

The present invention can realize better cutting performance while suppressing an influence of, for instance, deflection of a head and an increase in a moment acting on a fastening mechanism even when a cutting insert of a long total length is used. A shank of a head replaceable type cutting tool includes: a fastening mechanism that is formed at a leading end part in a longitudinal direction of the shank, and attaches a head; and a recessed part that is formed at the leading end part so as to accommodate a part of a cutting insert held by the head and avoid an interference with the cutting insert. The recessed part may be provided to accommodate a non-use part of the cutting insert held by the head in a state where the head is attached to the leading end part, and avoid an interference with the cutting insert.

First claim

What is claimed is:

1. A shank of a head replaceable type cutting tool, the shank comprising:
an attachment part to which a head is attached, the attachment part being located at a forwardmost end face of a leading end part in a longitudinal direction of the shank;
a fastening mechanism located at the leading end part, the fastening mechanism being configured to attach the head to the attachment part; and
a recessed part disposed at the leading end part so as to accommodate a part of a cutting insert held by an insert mounting seat of the head and avoid an interference with the cutting insert;
wherein the attachment part and the leading end part of the shank are arranged such that an entirety of the insert mounting seat of the head is disposed forward of the forwardmost end face of the leading end part when the head is attached to the attachment part; and
wherein an entirety of the recessed part is disposed rearward of the insert mounting seat of the head when the head is attached to the attachment part.

2. The shank according to claim 1 , wherein
the shank has a cuboid shape of which a lateral cross-sectional shape perpendicular to the longitudinal direction of the shank is a rectangular shape,
the fastening mechanism is for attaching and detaching the head, and includes an attachment/detachment operation part capable of attaching or detaching the head in a direction substantially perpendicular to the longitudinal direction, and
the recessed part has a shape that is recessed from a first reference face, the shape being recessed from the first reference face by a distance smaller than a width of the first reference face and larger than 10% of a width of a face of the shank that is adjacent to and perpendicular to the first reference face, the first reference face being on an opposite side to an operation face which is provided with the attachment/detachment operation part, among side surfaces of the shank.

3. The shank according to claim 2 , wherein the recessed part accommodates a non-use part of the cutting insert held by the head in a state where the head is attached to the leading end part, and avoids an interference with the cutting insert.

4. The shank according to claim 3 , wherein a side surface, which is provided with the operation face, among the side surfaces of the shank has a stepped shape, and a stepped part that forms the stepped shape is provided closer to a base end part along the longitudinal direction than a stepped part formed between the first reference face and the recessed part.

5. The shank according to claim 2 , wherein the operation face is a plane that continuously extends over a total length of the shank.

6. The shank according to claim 5 , wherein a distance between the operation face and the first reference face is larger than the width of the first reference face.

7. The shank according to claim 2 , wherein a head attachment/detachment hole of the fastening mechanism for attaching and detaching the head is offset and disposed in a direction farther from the recessed part than from a central axis of the shank extending in the longitudinal direction.

8. The shank according to claim 2 , wherein a rib is formed at the recessed part.

9. The shank according to claim 8 , wherein the rib is formed on one side of the recessed part in a width direction of the first reference face perpendicular to the longitudinal direction of the shank.

10. The shank according to claim 8 , wherein the rib is formed on both sides of the recessed part in a width direction of the first reference face perpendicular to the longitudinal direction of the shank.

11. A cutting tool comprising the shank according to claim 1 .

Assignees

• Tungaloy Corp

Inventors

• Suzuki Yusuke

Classifications

• B23B27/08

  Cutting tools with blade- or disc-like main parts {(with disc-like main parts B23B27/083)} · CPC title

• B23B2205/12

  Seats for cutting inserts · CPC title

• B23B2200/369

  Mounted tangentially, i.e. where the rake face is not the face with the largest area · CPC title

• B23B31/1076

  with conical ends · CPC title

• B23Q1/00

  Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members (B23Q37/00 takes precedence {; positioning supports for measuring arrangements G01B5/0004; motorised alignment for optical elements G02B7/005; handling of mask or wafer G03F7/70691; adjusting or compensating devices for optical apparatuses G12B5/00; piezoelectric or electrostrictive positioners H10N30/20}) · CPC title