ENLARGED-DIAMETER HOLE SECTION CUTTING DEVICE

Title:

ENLARGED-DIAMETER HOLE SECTION CUTTING DEVICE

Document Type and Number:

WIPO Patent Application WO/2020/105291

Kind Code:

A1

Abstract:

This enlarged-diameter hole section cutting device (10) is for cutting an enlarged-diameter hole section in a hole formed in a workpiece, the enlarged-diameter hole section cutting device (10) being provided with: a rod-like member (40) having a shaft section (41) and a guide body (42) which is provided with a tip surface (44) on the reverse side from the shaft section (41) and an inclination surface (45) inclined from the shaft section (41) side toward the tip surface (44) side in a direction away from the center axis of the shaft section (41); and a cutter blade (30) having a cutting section (32) which is provided with a cutting edge section (35) on the tip thereof and can slide along the inclination surface (45), wherein the rod-like member (40) further has a suction passage (80) including a flow path (81) having a suction port (81a) open in the tip surface (44).

Inventors:

MIYANAGA MASAAKI

Application Number:

PCT/JP2019/039096

Publication Date:

May 28, 2020

Filing Date:

October 03, 2019

Export Citation:

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Assignee:

KK MIYANAGA (JP)

International Classes:

B28D1/14; B28D7/02; E21B10/32

Domestic Patent References:

WO2015025492A1

2015-02-26

Foreign References:

JP2012071505A	2012-04-12
JPS62249714A	1987-10-30
JP2564100Y2	1998-03-04

Other References: