BLADE EDGE REPLACEABLE-TYPE DRILL - NACHI FUJIKOSHI CORP

Title:

BLADE EDGE REPLACEABLE-TYPE DRILL

Document Type and Number:

WIPO Patent Application WO/2020/218110

Kind Code:

A1

Abstract:

Provided is a blade edge replaceable-type drill (100) configured such that a head component (10) can be fastened to a body component (50) in a stable manner without a shaft portion being provided to the head component. This blade edge replaceable-type drill comprises a head component and a body component, wherein the head component is provided with: a vertical wall surface part that is positioned more toward a rear side in the rotation direction of the blade edge replaceable-type drill than a flank adjacent to a cutting blade; and a curved surface part that is positioned more toward the rear side and a center side in the rotation direction of the blade edge replaceable-type drill than the vertical wall surface part. The curved surface part is constituted by a front curved surface part that is inclined toward the leading end side of the head component, and a rear curved surface part that is positioned more toward a rear end side of the head component than the front curved surface part. Two columns are provided opposing each other at one end side of the body component, and each column has an outer peripheral wall surface part and an inner peripheral wall surface part. The head component and the body component are fastened to each other by bringing the vertical wall surface part of the head component and the outer peripheral wall surface part of the body component into contact and bringing the rear curved surface part of the head component and the inner peripheral wall surface part of the body component into contact.

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JP2957906	[Title of the Invention] A core drill for drilling a small diameter hole and a method for manufacturing the same.
WO/2009/133814	SURFACE COATED CUTTING TOOL

Inventors:

DOI MASAHARU (JP)
MATSUMOTO HIROAKI (JP)

Application Number:

PCT/JP2020/016545

Publication Date:

October 29, 2020

Filing Date:

April 15, 2020

Export Citation:

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Assignee:

NACHI FUJIKOSHI CORP (JP)

International Classes:

B23B51/00; B23B51/02

Domestic Patent References:

WO2008014367A1	2008-01-31
WO2011070652A1	2011-06-16

Foreign References:

JP2012520777A	2012-09-10
CN105537654A	2016-05-04
US20180264558A1	2018-09-20
JP2019209439A	2019-12-12
JP2011005629A	2011-01-13

Attorney, Agent or Firm:

ASAMURA PATENT OFFICE, P.C. (JP)

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