Title:
THREAD MILL
Document Type and Number:
WIPO Patent Application WO/2024/047725
Kind Code:
A1
Abstract:
Provided is a thread mill that can extend tool life-span by reducing the stripping of a female thread being processed. This thread mill (10) comprises: a plurality of threading edges (20a, 24, 29) which are disposed, apart from each other by an interval in a circumferential direction, on a leading end (14) side of the outer circumference of a tool body (12); and a plurality of end cutting edges formed at the leading end (14) of the tool body 12. Each of the end cutting edges has formed therein: a functional edge part (35) that is for cutting an object being processed; and a non-functional edge part (36) that is relieved toward a shank end (13) side in the axial direction with respect to a trajectory of the functional edge part (35) obtained when the tool body (12) is rotated one revolution about the shaft center (C) thereof.
Inventors:
WATANABE MASATOSHI (JP)
Application Number:
PCT/JP2022/032496
Publication Date:
March 07, 2024
Filing Date:
August 30, 2022
Export Citation:
Assignee:
OSG CORP (JP)
International Classes:
B23G5/18
Domestic Patent References:
| WO2016203519A1 | 2016-12-22 |
Foreign References:
| JP6692932B2 | 2020-05-13 | |||
| JPH03184721A | 1991-08-12 | |||
| JPH08141843A | 1996-06-04 |
Attorney, Agent or Firm:
PATENT FIRM SHINMEI CENTURY (JP)
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