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1. (WO2018180119) BROACHING TOOL

Pub. No.:    WO/2018/180119    International Application No.:    PCT/JP2018/007155
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Feb 28 00:59:59 CET 2018
IPC: B23D 43/02
B23D 43/04
B23F 21/26
Applicants: NIDEC CORPORATION
日本電産株式会社
Inventors: WATANABE, Masaru
渡辺 賢
TAMAKI, Koji
玉木 公二
FURUKAWA, Tomohiro
古川 智啓
Title: BROACHING TOOL
Abstract:
An aspect of this broaching tool is provided with a plurality of processing blade parts aligned along a central axis extending in the vertical direction. Each of the processing blade parts has a plurality of teeth sections protruding outward in a radial direction. The plurality of teeth sections are arranged in parallel in the peripheral directions thereof for each processing blade part. The teeth sections of the processing blade parts neighboring each other in the axial direction thereof are disposed such that the teeth sections in one processing blade part are disposed between teeth sections which, in the other processing blade, neighbor each other in the peripheral direction when viewed in the axial direction. In each of the processing blade parts, The teeth sections of each of the processing blade parts overlap in the axial direction with the teeth sections of at least one of the non-neighboring processing blade parts.