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JP-2026075948-A - Body and cutting tools

JP2026075948AJP 2026075948 AJP2026075948 AJP 2026075948AJP-2026075948-A

Abstract

[Problem] To provide a body and cutting tool that can deliver a sufficient amount of coolant to the tool tip, ensuring smooth chip evacuation and extending tool life. [Solution] The cutting tool body 10 for machining a workpiece with a tip cutting edge 81 positioned on the tip side and an outer peripheral cutting edge 82 positioned on the outer circumference, comprises a first coolant passage 60 provided inside and extending from the base end toward the tip, and a groove-shaped second coolant passage 90 provided on the outer circumference and extending along the central axis 10A. [Selection Diagram] Figure 7

Inventors

  • 佐々木 泰岳
  • 佐治 龍一
  • 佐々木 凌

Assignees

  • 株式会社タンガロイ

Dates

Publication Date
20260511
Application Date
20241023

Claims (7)

  1. A cutting tool body that processes a workpiece using a cutting edge positioned at the tip and a cutting edge positioned at the outer circumference, A first coolant flow path is provided inside and extends from the base end to the tip, A groove-shaped second coolant flow path is provided on the outer circumference and extends along the central axis, Equipped with, body.
  2. The base end is a retaining part that is fitted into a cylindrical sleeve and attached to the sleeve. The second coolant passage is not provided in the holding portion. The body according to claim 1.
  3. The thickness of the thinnest portion between the outer circumferential surface and the first coolant flow path is greater than or equal to a predetermined dimension. The body according to claim 1.
  4. A body according to any one of claims 1 to 3, A cutting insert having the aforementioned cutting edge and the aforementioned outer peripheral cutting edge, which is mounted on the body, Equipped with, cutting tools.
  5. The second coolant passage is positioned at the same circumferential position with respect to the discharge hole formed in the sleeve from which the coolant is discharged. The cutting tool according to claim 4.
  6. The tip cutting edge and the outer peripheral cutting edge are integrally provided at the tip of the body according to any one of claims 1 to 3. cutting tools.
  7. The second coolant passage is positioned at the same circumferential position with respect to the discharge hole formed in the sleeve from which the coolant is discharged. The cutting tool according to claim 6.

Description

This invention relates to a body and a cutting tool. Conventionally, composite tools having both a cutting edge at the tip and a cutting edge at the outer circumference have been known. These composite tools can perform both drilling using the cutting edge at the tip and internal/external diameter turning using the cutting edge at the outer circumference. As an example of this type of cutting tool, Patent Document 1 describes a cutting tool that has a coolant channel inside the tool, through which coolant is discharged to the vicinity of the cutting edge and towards the tool tip, thereby improving chip evacuation and extending tool life. Furthermore, Patent Document 2 discloses a cutting tool having multiple groove-shaped coolant channels on the outer circumference of the shank portion, which is attached to a sleeve that can be mounted on a machine tool, for supplying coolant toward the tip of the tool. Patent No. 7449504Patent No. 7535254 This is a perspective view showing a cutting tool in one embodiment of the present invention.This is a plan view of the cutting tool, seen from one direction perpendicular to the central axis and along the threaded hole of the insert pocket.This is a side view of the cutting tool, seen from one direction perpendicular to the central axis and perpendicular to the threaded hole in the insert pocket.This is a side view of the cutting tool, seen from a direction perpendicular to both the central axis and the threaded hole in the insert pocket.This is a view (rear view) of the cutting tool from a direction perpendicular to the central axis and along the threaded hole of the insert pocket.This is a view of the cutting tool from the tip of the body along the central axis.This is a perspective view of the body.This is a view of the body from the tip side along the central axis.This is a perspective view showing the internal structure of the body as if seen through a glass window.This is a cross-sectional view taken along line X-X in Figure 7.This is a perspective view of a cutting tool mounted in a sleeve.This is a view from the tip side of the cutting tool mounted in the sleeve.This is a perspective view of a cutting tool mounted in a sleeve with an ejection hole.This is a view from the tip side of a cutting tool mounted in a sleeve with an ejection hole. The following describes in detail preferred embodiments of the body and cutting tool according to the present invention with reference to the drawings (see Figures 1 to 14). The cutting tool 1 of this embodiment is formed as a multi-functional tool (composite tool for drilling and turning) capable of both drilling and internal/external diameter turning. The body (sometimes called a holder) 10 of the cutting tool 1 is provided with an insert pocket (insert mounting seat) 20, a chip discharge groove 30, a first coolant passage (cutting edge cooling passage 40, chip discharge passage 50) 60, and a second coolant passage 90 (lubrication grooves 91, 92, 93) (see Figures 7, 9, etc.). The body 10 is formed in a substantially cylindrical shape extending along the central axis 10A from the base end 10b to the tip end 10t (see Figure 1, etc.). A shank portion (holding portion) 14 is provided on the base end 10b side of the body 10 (see Figures 1, 7, etc.). The shank portion 14 is the part of the body 10 that is mounted on a sleeve 101A (see Figures 11, 12) that can be mounted on a machine tool, or a sleeve 101B with a discharge hole (see Figures 13, 14). This shank portion 14 is substantially cylindrical in shape, and a notch portion 14f is formed in a part of the shank portion 14 that functions as an anti-rotation mechanism for the sleeves 101A, 10B. The notch portion 14f may be a flat surface parallel to the central axis 10A (see Figures 1, 7, etc.). In this embodiment, the outer diameter of the shank portion 14 in the body 10 is smaller than the outer diameter of other parts of the body 10 (for example, the tip portion 10t), making it the smallest part of the body 10. A stepped portion 15 is formed between the shank portion 14 and the part of the body 10 closer to the tip portion 10t than the shank portion 14, where the outer diameter changes abruptly (see Figures 1, 7, etc.). The insert pocket 20 functions as an insert mounting seat for the cutting insert 80 and is formed on the tip portion 10t along the central axis 10A of the body 10 (see Figures 7, 8, etc.). The seating surface 21 of the insert pocket 20 is provided with a screw hole (fastening portion) 22 into which the insert mounting screw 70 is screwed. The cutting insert 80 is formed in a roughly rectangular shape in plan view. The cutting insert 80 has a cutting edge 81 at a front end and a cutting edge 82 at a pair of opposing corners (see Figures 1 and 2, etc.). The cutting insert 80 is positioned in the insert pocket 20 of the body 10, with one corner having a cutting edge 81 and an outer cutting edge 82 positioned on the outer circumference side of the tip. It is then fa